The way that I use a dryer sheet, is to take a NEW one, get my iron nice and hot. Place a piece of scrap fabric on a pressing surface, put the dryer sheet on top of the scrap, at one side. Now, take the hot iron run over the top of the dryer sheet and directly onto the scrap of fabric. A (new) dryer sheet has something in it that gets very slick when heated up. This will sort of pull the stuff off the iron and onto the scrap of fabric as you pass onto it.
Works great.
Here is a video Sharon Schamer did on a more involved cleaning:
http://www.beginningquilter.com/vide...ron/index.html