I use Photoflo and don't bother with distilled water. Filtered tap water in my area is plenty good enough. Never used a squeegee on my film either, and my films dry clear and clean. I learned many years ago that Photoflo at 1+200 with my water is far too strong, and produces lots of foam. You don't want that. You want only enough Photoflow to prevent the water from beading up, but not enough to make foam. My standard dilution for Photoflo is somewhere between 1+400 and 1+500; it's not at all critical to be more precise than that. Another thing you might want to try is the substitution of plain old clear drugstore rubbing alcohol for about 20% to 25% of the volume of water. Your negatives will dry a little faster and the working solution of Photoflo will last a long time without those nasty, ugly floating things growing in it.