My last ones didn't wear out but became too flat and just didn't t do the job as well soooo here are some new ones. My own pattern which I just made up as I went along. I constructed these in one pass start to finish. They slip on like a slipper and have a tie to keep them in just the right spot.
They can be easily removed for cleaning and reused. I always make at least two so that there are no excuses for cleaning.