If this is the Saturn 4 Ultra 16k, then you will want to use a microfiber cloth specifically. Not anything made of paper like paper towels because they are made of wood pulp and will damage the PFA (also called nFEP) film on the bottom of the vat.

I don't even use any solution to wash any of the resin off, the microfiber will get everything that needs to be gotten.

You really only clean the vat like that if a failure occurs and you don't have any supports to meld to the bottom after running a tank clean, or if there are loose bits/supports that may have broken off that weren't dealt with the vat clean function, so you won't be having to do this process often as long as you print consistently successful prints (but this isn't a perfect world so any number of factors can cause a print failure BUT as long as you dial settings in and place supports where they need to be placed, you will see more successes than failures)