I'm still using the PolyDent every now and then for the gunked up attys from the dark juices i.e. MsT's, The Vapor Room Super Mint, some coffee flavors.
The clear juices don't seem to gunk my attys up...i.e TWDV mentholyptus, ECOpure, Digital Cigsz Sub Zero Menthol etc.
When it gets to the dry burn time, even on attys just as routine maintenance before they even need the PolyDent cleanse, I have discovered that putting them on my little 5v mod is a "sure fire" way to perk them up again and get them glowing bright and vaping like champs.
CAUTION: Only a few short pulses is all it takes, making sure they don't get too hot, then they go back on my 510's, eGos, Rivas.
Putting a few drops of plain PG on them, blowing them out, few more drops, blowing them out, and then dry burning also seems to clear out some of the tobacco flavors pretty good, too.
I've also discovered that when an atty is just not putting out the vapor, it is time to replace the cart filler. I use Fluval and it seems to quick wicking good after a few days. When I replace it, I'm good to go for a few more days without any atty cleaning or dry burning.