I have found that H2O effects the towels long-term much more than any other sealant or wax. Now, that you mention it, though, I do wash the towels used to remove Paint Sealant and Glass Selant with the towels used to apply and remove H2OGG.
Wax, Glaze, Dry, Rinseless, Waterless, Glass cleaning, polish removal, etc. I wash all of these together and have not had any problems.