USBC rules clear that non-approved cleaners are illegal 'at all times' on bowling balls used in certified competition

I’m not quite old enough to have experienced the "soaker" era of the early 1970s, but I’ve bowled through everything since, from sanding with Scotch-Brite during competition in the early urethane era before that was banned, to standing in line for Lustre King machines with balls coated in Finesse in the early reactive resin years, to the current era of Abralon and Tru Cut pads and cleaners designed for bowling balls. Partly due to my career winding down and not being as serious a com...