Aneros staining

I ordered 3 Aneros products from https://betweenthesatinsheets.com . My understanding is that they’re a reputable dealer.

My Eupho Trident and Helix Trident both came in white and feels a little rough (not 100% smooth), and the Maximus Trident came in a smooth/sleek black material. From what I can tell, I think the Maximus gets fully cleaned.

However, both the Eupho and Helix seem to be staining and I’m not convinced they aren’t porous and are actually getting 100% clean between uses. Are my products defective?