It seems like anything that doesn't evaporate completely would leave some residue. That's one thing about liquid dish washing detergent. Anyone who's ever spilled that stuff can tell you it does not evaporate. It just slowly turns into a thick gummy crud. Maybe I should put some Photo-Flo in a dish and see if it evaoporates completely.
Originally Posted by patrickjames
I've never tried Edwal LFN. I tried their "no-scratch" stuff on a marginally playable DVD once, though. I thought I was being so clever, but it didn't work, so I used their film cleaner to clean it off. Bad idea. It's no longer marginal.