Most beers I have made have cleared after time and the ones that did not were either not supposed to or I did not care (cause it was good beer). I have used whirlock and Irish Moss, but never had a chance to use gelatin.
I do not use anything at this particular time, as I have enough time between primary and consumtion that they normally clear on their own.
As other have noted, Irish Moss and Whirlock should be used in the boil.
Salute!
