Here's another option: Turn them into hand towels.
They are great for drying dishes. What isn't good enough to be on display, so to speak, in the bathroom where every visiting guest will see it can be just fine in the kitchen. Alternatively, you can discard the one quadrant with the stain or tear in it.
I edged these with the serger, but you could also use double-fold bias-tape, a zig-zag stitch on an ordinary sewing machine, pinking shears that will make a zig-zag edge, or just cut them. They won't last as long just cut, granted, but you'll get a little more use out of them.
Frugal and easy!