So I've been messing with diy for awhile now and I'm wondering what the community thinks is the best flavor company that gunks the least. Honestly flavor is great but if I can't vape 5ml of it before my coil is straight black and tastes gross then I'm not interested. I've mainly been using tfa and a few flabors from hangsen. Tfa flavors have been destroying my coils. I mainly use fruit flabors, no creams either... The culprit now is blueberry and mango flabors that. Any suggestions? Also I'm not adding any sweetners either.