We’ve lived with this indoor pool for twenty years. It is well maintained, just off the family room, so visible from inside. We have a WYBOT robotic pool cleaner which works very well, except for the fine silt and dirty DE which collects in the bottom mostly during the winter when we rarely use it. But some is always there. The filter just doesn’t get it out. I am wondering whether I could line the basket with cheesecloth for a finer filtering job. Anyone ever tried this? Or pool specific cotton balls?