Doesn't bother me very much...
I would think the easy valve wouldn't be so greatly affected by herbs, probably more resiny build up?
Found a pretty good guide.. Wasn't sure if FC allowed links to exterior links so I'm posting the guide here---
Text heavy, Sorry!
Low temperature: up to 150°C (302°F)
* Angelica: 100°C to 150°C (212°F to 302°F) ~ Useful in the treatment of fevers, colds, coughs, flatulent colic and other stomach disorders.
* Black Horehound: 100°C to 125°C (212°F to 257°F)
* Blue Lotus: 100°C to 125°C (212°F to 257°F)
* Chamomile: 100°C to 125°C (212°F to 257°F) ~ Main Properties: Anti-inflammatory, antispasmodic, relaxant, carminative, bitter, nervine.
* Clove: 125°C to 150°C (257°F to 302°F)
* Corn Silk: 100°C to 125°C (212°F to 257°F)
* Dandelion: 125°C to 150°C (257°F to 302°F) ~ Used for the treatment of the gall bladder, kidney and urinary disorders, gallstones, jaundice, cirrhosis, hypoglycemia, dyspepsia with constipation, edema associated with high blood pressure and heart weakness, chronic joint and skin complaints, gout, eczema and acne.
* Goldenrod: 100°C to 150°C (212°F to 302°F)
* Gotu Kola: 100°C to 150°C (212°F to 302°F)
* Horsetail: 100°C to 150°C (212°F to 302°F)
* Hyssop: 100°C to 150°C (212°F to 302°F)
* Lavender: 100°C to 125°C (212°F to 257°F) ~ Main Properties: Carminative, relieves muscle spasms, antidepressant, antiseptic and antibacterial, stimulates blood flow.
* Lemon Balm: 142°C (288°F) ~ Main Properties: Blood circulation, Headache relief
* Meadowsweet: 100°C to 150°C (212°F to 302°F)
* Motherwort: 100°C to 150°C (212°F to 302°F)
* Passionflower: 100°C to 150°C (212°F to 302°F) ~ Main Properties: Anti-inflammatory, antispasmodic, hypotensive sedative, tranquilizing.
* Peppermint: 100°C to 150°C (212°F to 302°F) ~ Main Properties: Carminative, relieves muscle spasms, increases sweating, antiseptic.
* Purslane: 100°C to 150°C (212°F to 302°F)
* Sage: 125°C to 150°C (257°F to 302°F) ~ Main Properties: Astringent, antiseptic, aromatic, carminative, estrogenic, reduces sweating, tonic.
* St. John's Wort: 100°C to 150°C (212°F to 302°F) ~ Used in treating a wide range of disorders, including pulmonary complaints, bladder problems, diarrhea and nervous depression. CAUTION: St. John's Wort may interfere with other medications. Please tell your doctor that you are or plan to use it.
* Syrian Rue (Peganum harmala): 100°C to 150°C (212°F to 302°F)
* Thyme: 100°C to 150°C (212°F to 302°F) ~ Main Properties: Antiseptic, tonic, relieves muscle spasm, expectorant.
* Tobacco: 125°C to 150°C (257°F to 302°F)
* Wormwood: 100°C to 150°C (212°F to 302°F)
* Yarrow: 100°C to 150°C (212°F to 302°F) ~ Used in alternative medicine as an antiseptic, antispasmodic, astringent, carminative, diaphoretic, digestive, emmenagogue, stimulant, and tonics, vasodilator and vulnerary. Yarrow is used against colds, cramps, fevers, kidney disorders, toothaches, skin irritations, and hemorrhages, and to regulate menses, stimulate the flow of bile, and purify the blood.
* Yerba Mate: 100°C to 150°C (212°F to 302°F)
Medium temperature: up to 175°C (347°F)
* Anise: 150°C to 175°C (302°F to 347°F) ~ Pharmacologic action: carminative, antispasmodic, expectorant, a pancreatic stimulant.
* Caraway: 150°C to 175°C (302°F to 347°F)
* Cat's Claw: 150°C to 175°C (302°F to 347°F)
* Coffee beans: 150°C to 175°C (302°F to 347°F)
* Comfrey: 150°C to 175°C (302°F to 347°F)
* Damiana: 150°C to 175°C (302°F to 347°F) ~ Main Properties: Nerve tonic, antidepressant, urinary antiseptic.
* Ephedra: 125°C to 175°C (257°F to 347°F) ~ Caution is advised as an overdose can be fatal, causing high blood pressure, racing of the heart, confusion, nervous stupor, twitching, convolutions and death. Ephedrine is seen as a performance-boosting herb and is a forbidden substance in many sporting events such as athletics. This herb should not be used by people who are taking monoamine oxidase inhibitors, or suffering from high blood pressure, hyperthyroidism or glaucoma.
* Fennel: 150°C to 175°C (302°F to 347°F)
* Feverfew: 125°C to 175°C (257°F to 347°F) ~ Should be taken regularly to receive maximum benefit and protection from migraines. The leaves and flowering heads are antiinflammatory, antispasmodic, aperient, bitter, carminative, emmenagogue, sedative, stimulant, stomachic, vasodilator and vermifuge.
* Hawthorn: 125°C to 175°C (257°F to 347°F)
* Ginkgo: 125°C to 175°C (257°F to 347°F) ~ Helpful in the treatment of allergies, Alzheimer's disease, anxiety attacks, arthritis, ADD, circulatory disorders, cancer, coughs, depression, dizziness, equilibrium problems, headaches, heart & lung problems, memory loss, mood swings, muscular degeneration, tinnitus, toxic shock syndrome, varicose veins, vascular impotence & vertigo.
* Guarana: 125°C to 175°C (257°F to 347°F)
* Lion's Tail (Wild Dagga): 150°C to 175°C (302°F to 347°F)
* Milk Thistle: 125°C to 175°C (257°F to 347°F)
* Prickly Poppy: 150°C to 175°C (302°F to 347°F)
* Red Poppy: 125°C to 175°C (257°F to 347°F)
* Saw Palmetto: 125°C to 175°C (257°F to 347°F)
* Sweet Flag: 150°C to 175°C (302°F to 347°F)
High temperature: up to 200°C (392°F)
* Aloe Vera: 175°C to 200°C (347°F to 392°F) ~ Toughens up the immune system owing to the 23 peptides contained by the aloe vera, it accelerates and regulates the methabolism, purifies the human body from toxins, bringing about a feeling of calm. Moreover, aloe vera has an antiseptic effect (by distroying the bacterias, viruses and fungi), disinfectant capabilities and can also stimulate the cell-renewing process. Aloe vera nourishes and supports the digesting of aliments. Cutting across the human organism, aloe vera manages to bring the human body to a general balanced state.
* Ayahuasca (Banisteriopsis caapi): 185°C to 200°C (365°F to 392°F)
* Barberry: 175°C to 200°C (347°F to 392°F) ~ CAUTION: Exceding the recommended doses leads to the occurance of side efects (nausea, vomit, dizziness, convulsions) and can also lead to nosebleeds, kidney failure, swells of skin and eyes, blood sugar decrease. The mixturees made from crust of barberry are forbidden to children, pregnant women or women in lactation period. In cases of interaction between this herb with other medicinee to avoid side effects, the advice of the physician should be sought. Used to fight against diarrhea (and in its more serious forms - cholera), against fever, anemia and also against hangovers.
* Burdock: 150°C to 200°C (302°F to 392°F) ~ Used for treating acne, eczema, endometriosis, fibroids and psoriasis.
* Couch Grass: 175°C to 200°C (347°F to 392°F)
* Evening Primrose: 150°C to 200°C (302°F to 392°F) ~ The leaves are astringent and sedative. Used in the treatment of gastro-intestinal disorders, whooping cough and asthma.
* Fly Agaric (Amanita muscaria): 175°C to 200°C (347°F to 392°F)
* Fringe Tree:175°C to 200°C (347°F to 392°F)
* Garlic: 175°C to 200°C (347°F to 392°F)
* Ginger: 175°C to 200°C (347°F to 392°F) ~ Used in the treatment of debility associated with old age or illness, lack of appetite, insomnia, stress, shock and chronic illness. Ginseng also increases immune function, resistance to infection, and supports liver function. The leaf is emetic and expectorant.
* Ginseng: 175°C to 200°C (347°F to 392°F)
* Goldenseal: 175°C to 200°C (347°F to 392°F) ~ CAUTION: Large doses are poisonous and extended internal use or use during pregnancy is not recommended. Used internally only for short periods of time (3 months or less) as an antiseptic, antibacterial, antispasmodic, laxative, and astringent. Used as an infusion or weak tea for upset stomach and disorders of the digestive system.. The powdered root may be snuffed or sniffed in the nose for infected sinuses.
* Hops: 175°C to 200°C (347°F to 392°F)
* Kava Kava: 175°C to 200°C (347°F to 392°F)
* Kola Nut: 185°C to 200°C (365°F to 392°F)
* Kratom: 175°C to 200°C (347°F to 392°F) ~ CAUTION: This can be an addictive substance. Has a yohimbe-like stimulant activity, and uncaria-like immunostimulant activity. Kratom is said to produce a sense of well-being, with users reporting anti-depressant, anti-anxiety, analgesic, and even euphorigenic effects. It is paradoxically a stimulant and depressant, used to aid work and also able to contribute to rest and sleep. Kratom's psychoactive effects are reported to be relatively short-lived, typically fading after a few hours.
* Licorice: 175°C to 200°C (347°F to 392°F)
* Maca Root: 150°C to 200°C (302°F to 392°F)
* Marshmallow: 150°C to 200°C (302°F to 392°F) ~ Used in the treatment of dysentery, lung ailments and urinary ailments. The tea is also taken for gastritis and enteritis or used as an enema for intestinal inflammations, and is an excellent laxative for young children.
* Morning Glory: 185°C to 200°C (365°F to 392°F)
* Sida Cordifolia: 175°C to 200°C (347°F to 392°F)
* Salvia Divinorum: 175°C to 230°C (347°F to 392°F)
* Sinicuichi (Mayan Sun Opener): 175°C to 200°C (347°F to 392°F)
* Turmeric: 175°C to 200°C (347°F to 392°F)
* Valerian: 185°C to 200°C (365°F to 392°F) ~
* Wild Yam: 175°C to 200°C (347°F to 392°F) ~ Used to alleviate many of the symptoms of menopause and PMS such as hot flashes, night sweats, mood changes, and vaginal dryness. It is also used to treat irritable bowel syndrome, gastritis, gall bladder complaints, spasmodic cramps, painful menstruation, and in small doses is especially helpful in treating the nausea of pregnant women.
* Yohimbe: 185°C to 200°C (365°F to 392°F)