Microfibre can be machine washed very satisfactorily. . But don't wash with other fabrics/materials. And don't use any fabric softener in the wash or dryer. good luck.

This is so funny .... I just finished dusting my LR and FR with my microfiber cloths. I use 2 cloths, one just dampened with plain water and a dry one. I wipe my furniture down well with the damp one and then dry it thoroughly before I replace my lamps and stuff. If I feel the cloth gets too dirty, I just rinse it in the sink.

I try to wash a load of microfibers by themselves, but many times they end up in the regular wash. I DO make sure they don't go in the dryer with other stuff -- I either fold them over hangers to dry or just toss them in by themselves. They dry in a jiffy.

It is so nice to feel like I'm removing the dust rather than just rearranging or even polishing the dust onto the table.