Whenever I sanitise ( with VWP ) I don't just chuck it away, I put it into a fermentation bucket outside my house. I stick all my bits n bobs - stainless beer paddle, syphon and bits in there, and leave them there until the next brew and I'll top it up with more sanitiser when I stick the next brew on.
Interested on any issues with this, but specifically may I ask your opinion if a stainless steel spoon left here for a week should only need a rinse before use - rinse again after stirring return to sanitising bucket?