John
Throwing him in at the deep end I like! Hopefully you trained him in the rocket science like wand technique, not many do that!
Paul
Been reliably informed DON’T!
(When you next clean that same carpet with Blitz the pH will move further: to 7 or even 7.5. Maybe still no visible colour bleeding will occur. But the next time… bang, there it goes!)
Don’t you just love gaffer tape on these jobs?
Len