Originally Posted by Timmyjoe
Photo-Flo for thirty seconds, then hang it. Never had a problem.
Except for the never had a problem part. When I started, I used the "few drops of Photo-flo" that many people continue to recommend, and did get water spots. Now, I use an amount close to the 1:200 recommended on the Photo-flow bottle. That's over 1ml per 35mm film reel, which is more than a few drops. (Actually, about 30 drops, when checked with a Visine dropper.)