PBW and Oxyclean Single Use?

[H22W]

When it is not very dirty, I am wondering if it's feasible to save a PBW mixed solution for future cleaning.

I have been figuring that when it bubbles, that is the "cleaning power" bubbling away, And it couldn't be reused in the future?

 

[mpcluever]

While most effective right away, I always save mine until it gets fairly dirty.