I solved the drippy coaster problem in which condensation drips all over my study materials. Why didn't I think of this sooner?
I took a piece of the cloth that is advertised to absorb ten (or maybe it's more) times its own weight in water, cut it in a circle to fit the stone coaster, and now, presto, between the cloth and the coaster, no more drips on the text books!
By Holly from Richardson, TX
This is a page about cleaning stone coasters. Porous stone can absorb stains and may be a challenge to clean.