With Hoshi's the SS. evap means you use regular cleaner and not nickel safe cleaner. The bowl brush is a good idea. Don't use any thing that would scratch this surface. Foe the tough mineral deposits I will use full strength cleaner with a wash rag or dish cloth to remove deposits. Make sure you wear gloves as this stuff eats skin too. On plastic surfaces I use green scotch brite and full strength cleaner. The brush doesn't hold the cleaner like a cloth does and you'll be applying more cleaner to the mineral buildup. Good Luck.