This is a Cleaning Guide for those who want to DIY.
We have used these cleaning methods successfully on TRP products.

We do not recommend these cleaning methods on non-TRP products.
For example, 409® will remove the white coating on black/white grids that are sometimes mistaken for ULTRABOUNCE®.

We have numbered the cleaning methods in suggested sequence.  For example, try #1 first, and then if that doesn’t remove the stains, then try #2, and so on. Less is more in this case!