Just curious how to counter advertising by Zerorez or to answer questions about customers that might be concerned about residue. The kind of prespray I use says it crystallizes upon drying to leave no residue. I am also looking at switching back to Clean Free which also claims no residue. For nasty jobs I've been using PowerMax which is your typical prespray which may leave residue. Some customers of mine have complained that 'the last guy' left their carpets crunchy feeling. Is that...
How do you tell if you are leaving residue behind?
How do you tell if you are leaving residue behind?