Meguiar’s X3003 Grit Guard $6.76

For those who missed the Meguiar’s X3003 Grit Guard deal last time, Amazon has a coupon you can clip (-$4.06) to bring the price down to $6.76
Not as good as the previous deal, but this is the lowest I’ve seen since.
I bought one (for the rinse bucket), don’t think I’d need one for the wash bucket. How do you guys use yours?
https://www.amazon.com/gp/product/B0051PKG2G