I wish I had a closeup picture of the tire wipers on my 406mm wheeled Dahon folding bike. It wears high performance Comet clincher tires which are thin and supple. I rode it 750 miles during the first six weeks of the pandemic while sheltering in place. I had no problems with either "noise" or punctures.
The wipers certainly proved their effectiveness. I found shards of glass and crushed seashells slivers stuck to them every day. But never once had to stop for a flat.
P.S. Hand wiping a 20" tire, front of rear, would be suicidal, IMO. YMMV.
