Step 11: Thoroughly wash off the etching cream...
When the time is up, immediately wash the glass off, making certain your
hands are protected with gloves.
I highly advise rinsing the etching cream off outside, or in a sink where the
waste water is caught and disposed of other than down the drain. Warm water
will work best, and will help aid in removal of the stickers.
We live in the country with a septic system, so this is why you see me rinsing
in the bathroom sink. It never hurts to be conscious of the things we stuff down
the drain that later will be mingling with the very water we drink.