Chillis are self pollinating, no need to do anything, i have never done this, and always get 100's of chillis(indoors or outsde), and at same time mine still drop 100's of flowers, thats nothing to do with them not be pollinated, usually the plant saying its not ready to produce yet, or the other way around, in that it has enough flowers on already, or one of many other reasons, not enough water,to much water,to hot,to cold, can be anything, its a problem for all chilli growers, i get massive flower drop every year.