What your probably just noticing is the wear on the ball.
Every time you roll a ball down the lane, in a manner of speaking your sanding the ball do to the friction against the lane, ball return etc.
Most polishes are just liquid abrasives and your just basically sanding the surface smoother with it. The exception being polishes that contain slip agents, which lets the ball skid more.
When you use a cleaner it's removing the oils & grime which hide the surface texture, so after cleaning you see the surface wear as it actually is.
So polish is not a coating that you put on a ball that can be "stripped off" just by a cleaner (like TPS) or "wear" off, It's not like putting a coat of wax on a car.
Now if you use a "Cleaner/Polish" that's different, because those cleaners contain a abrasive. Which could possibly dull a highly polished ball or polish a dull ball.
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