I find that any "waiting" is what leads to leaking. Do cool down pulls. Don't give the oil a chance to leak into the chamber. Most people I have seen that cause the oil to leak, don't let off the button early enough.
If you want a 10 second hit hold the button for 5 seconds. (OK with a -71 you might not be "Holding" the button LOL.) Continue drawing for at least say... 15 seconds AFTER you let off the button. Let the vapor get wispy and draw air into your lungs through the herc for a little bit after it's not putting out vapor. It's airflow through the Herc that cools it down. So if you take your hit with only 5 seconds "off the button" , and then hold it in that hit, well the Herc is hot, the oil inside is hot; you let the Herc just chill there w/no airflow, it's going to leak into the lower chamber.
After you take your hit. Do you want another one? Take it- the airflow through the herc keeps the oil "up." But when you are done, you need to draw air through the Herc, corresponding to how hot you got the thing during operation. It's easy to understand that the oil leaks through the 3 air inlet holes in the bottom of the coil chamber when the Herc is hot so draw air through it to cool it down! It's easy to know when it's cool enough if you just pull off the PTFE shield and touch the metal. After a bit of use, you won't need to pull the shield off.
A "Clogged" Hercules is a sure-fire sign that you aren't doing proper cool down draws. You're letting the warm oil leak through the air inlet holes and solidify there.
Once I fully understood how much cool down draws kept the oil up top, I do not need to crack open my herc for MONTHS. Just keep tossin in half grams.
*Edit the easiest way to remove the coil is to get the Herc fully warmed up by using it. Run it out of oil but while it's warm disassemble it and push the Ceramic rod through. Then take a small pokey tool or dabber from the bottom and gently push the inside of the donut up. I've messed up 2 Ti coils by trying to pick them out from the top / trying to force them up when the Herc was too cold. A heat gun can help warm everything up and will make moving the coil MUCH easier.