Cold: After fermentation is complete, I set my controller to 32F.
Gelatin: Once my beer reaches 32F I add gelatin. I heat 8 ounces of distilled water to about 120F and stir in 1 envelope of Knox unflavored gelatin. Ignore the aroma, it does not remain in the beer. Continue zapping in the microwave, stirring between zaps with a sanitized thermometer until it reaches 150F. At that temp it should become clear. I split that into two 4 ounce portions and pour 4 ounces per 6 gallons into my beer. I VERY gently oscillate the fermentor (about 2 seconds does it) to hypothetically spread the gelatin out. In about 2 days I rack the beer to a keg. I don't jostle the fermentor, and i fully purge the keg.
I suspect that some folks who don't get good results with gel fining, it's because they either don't get the beer cold enough first, or they move the fermentor around before racking. That kicks up the powdery sediment and defeats the purpose.
The only other fining I use is a half a tab of whilrflock per 6 gallon batch at the last 10min of boil.