I took a floor cloth class a few years ago and we cut pieces of fabric which were glued to a canvas... I cut mine into same size squares of fabric resembling a quilt top using colors which complimented my bathroom and also used some of the same fabric in which I had made the valance from. Floor cloths last a long time and can just be washed with soap and water like your floor.
check out
www.fredrixfloorcloths.com