Shirin : if you like you can light the torch as a full round action, then drop it into the swarm adjacent to you. The swarm will get a reflex save or take enough fire damage to destroy it. It is an adhoc ruling but should suffice since it is already so close to dispersing!<br/><br/>http://www.d20pfsrd.com/equipment/goods-and-services/tools-kits/#TOC-Flint-and-Steel