I wash ours with the diapers whenever I do a load and usually air dry it. LIke the PP, I have a couple, so I'm never without one, though they dry pretty quickly. <img alt="" class="inlineimg" src="http://www.mothering.com/discussions/images/smilies/smile.gif" style="border:0px solid;" title="smile">
I wash my liner about every other to every third load of dipes - I have never had any problems with it smelling bad at all. When I wash it, I toss it in the dryer for about 10 minutes (along with the rest of the dipes) and it is usually dry by that time
I wash mine like every other load <img alt="" class="inlineimg" src="http://www.mothering.com/discussions/images/smilies/innocent.gif" style="border:0px solid;" title="shy"> but I wash them along with my dipes and line dry as I do with the dipes too.