Diluted? In the shampoo tank? ...Perhaps a day or two.
Hydrogen peroxide loses it's fizz pretty quickly. Hydrogen peroxide needs to be stored in a sealed container. And it helps if the jug is kept in a relatively dark place too (like inside the back of your truck).
You should always try to finish up a job with as little as possible in your tank (regardless of which product you're using). Bio-degreadation begins to dissipate the effectiveness of ANY detergent within hours. So run the tank as low as you can on a job. And if the machine won't be used for a couple of days, drain the tank and flush a little water through the plumbing.
Rick Gelinas
