May I ask how do you guys use hydrogen peroxide on your cups to remove stains? Do you soak them in the solution, pour the solution over the cup or something else? Singapore sells it crazily ex at 3 dollars for 100ml and it isn't enough to even submerge one cup so I was wondering, how do you guys do it? And do you guys soak it before or after your cycle and how to wash off the hydrogen peroxide completely from the cup? Thanks!!