I have ordered rug pads from both Rug Pads USA and my local carpet shop. Both are dual-sided (one side soft, one side rubberized). However, both were absolutely filthy upon arrival. The one from Rug Pads USA smells like burnt rubber. Also, both of them have marker stains. The one from Rug Pads USA has blue marker from where it was marked for cutting; this blue marker rubs off but won't come off completely. The one from the local rug shop has green marker in the center. Are these types of rug pads just all filthy? I think the soft side is made of recycled materials. Surely there's a clean option besides those thin woven rug pads. Can I find one that's new/clean with no dust/dirt/paper on it? Can they be washed in the washing machine?