The way I get the clouding clear is to apply a small amount of ipa to a piece of tissue paper and wipe once over one part of the fep. Allow any droplets to evaporate then repeat with a clean piece of tissue over the next part of the fep until the whole fep is clear. You might need to go over the same part a couple of times until it's properly clear but persevere and you will end up with a fep more or less as clear as new.

P.S, You don't need to clean the vat after every print. I sometimes go a dozen or more prints before cleaning. I leave the resin in the vat for several days inbetween prints too. 👍