This is the real kicker on taste. If you leave your sub without cleaning for ages, it becomes EXTREMELY difficult to get it properly cleaned (especially if you did low temp dabs and use a dabmaster heater, which has a nasty spot right at the bottom of the heater where it sits in the atomizer that super over decarbed earl cooks into what almost looks like rust if left long enough)!I agree 100% with all your comments ^
actually except the no taste thing, whilst the taste isn't as prevalent as on my mighty or cloud,
i still get definitely tasty rips from the sub, just not as tasty, and you definitely have to clean it regularly if your using oil because I find the decarbed oil cooking on their for ages really begins to effect the taste of the flowers.
The effects on the taste of all of your hits from especially this kind of residue really makes every hit taste like generic earl with little taste.
Like my man MGG says, you should give that sub a thorough cleaning and see how you go. Remember that there's a fuckton of hot metal on that sub to get hidden bits of residue really super cooked up there over time!