[It... takes him a second. Like fancier fabrics? Silk or whatever? Sure, why not--

And then after a second it kicks in. Thank you, Mitsuru, for having the foresight to not put your underwear in on this. Having normal conversations would be hard for a bit after that.]

Oh. Yeah. [He's gonna pretend they're not talking about your rich-person panties and bras.]

It's way easier on stuff than throwing it in a machine. And for some fabrics, it's just better. [Like his fucking coat. Unless you are an absolute madlad you do not throw a woolen coat into a dryer. Or a woolen much of anything unless you want it felted to all hell.]

It's basically like washing anything else, you just wanna make sure you don't stretch or wring it too much. [At least with their bare supplies they'd managed to get some various types of detergent, so he'll start rummaging in the cupboards for that, before handing it out to her.]

Here. Add some soap, get it all mixed in, the start adding things and swishing them around a bit. After that, just... let it soak some.