A few things
1- Remember water will soften the slides making them more fragile.
If you use water cold is better.
2- Photoflo is a wetting agent to cause the water from the rinse in
developing to sheet off, it will not necessarily clean them and will
defiantly not remove oils from fingerprints or fallout from having a
smoker in the same room. Use a mild detergent to remove real crud if
you go the water route
What I would suggest instead is a multi stage process. First unless
the mounts are plastic buy new mounts, and even then you may want to
still get new ones, Then use canned air to remove loose dust Remove
the mount by separating the halves. If the mount is of the slip in
plastic type you may want to break it apart. The reason is sliding
the ‘slide’ out will embed and scratch the surface due to the crud.
Blow the slide off again Move to your Clean table Moisten the photo
chamois/pad/cotton with the isopropyl alcohol, and gently wipe the
film until it is clean (in a concentration of 98% or greater) (Yes I
stole this line from http://tinyurl.com/yzcwe62 ) Examine the slide
with a magnifying glass to verify that it is clean Remount the slide
Note wear cotton gloves for the last 2 steps.
Suggest invite a few friends over and crack a bottle of wine and
make it an assembly line type production. Or alternately do the first
4 steps one night then the other ones another night. This has the
advantage of allowing the dust you stirred up into the air to settle
and allows you to clean up in between.
PS for the “What alcohol, are you nuts” crowd, I will admit that I
cheated and used Google and did a search at Kodak ( search term was
cleaning slides -projector -transport -condenser site:Kodak.com ) to
confirm my old decrepit memory was not too faulty.
http://tinyurl.com/yzcwe62 gives one procedure using alcohol