Here's what you need:
Original Dawn Dish soap
Add 1 part dawn dish soap to 2 parts hydrogen peroxide to bottle.
The Dawn is pretty concentrated so you don't need much
to make a spray bottle's worth.
I used about 3 TBS dish soap & 6 TBS hydrogen peroxide.
Add water until the bottle is full.
The blue color will dissipate after a day or two.
And, as they say, the proof is in the puddin'.
Well here ya go!
Now go save yoself some money!