If it does I haven't noticed it. I used cleaner and just regular water both for about a year and there is no difference in rubber durability. The cleaner
I use a wet cotton with soap then, another wet cotton to remove the soap, and finally another piece of cottonto remove most of the water. It works good
At first, start with a very simple swing. Totally horizontal. Do not use wrist, do not swing bat in a semi circle. simply pull the bat back 30 cm and
It's the commercial version.
I dont think its national blue sponge.