Questions for cleaning professionals, basics and fundamentals?

Good day dear ones, I have a new job where I occasionally clean for clients (with their rather limited cleaning equipment). Generally, I really enjoy it and I do some cleaning at home now and then, but I can't really do the basics. So here are a few questions that I hope you can answer…

Husband wipes for mother-in-law and I have to clean up?

My husband mops the hallway for his mother on Fridays, and I have to get him the bucket, rag, scrubbing brush, and water. When he's finished, HE leaves the bucket and everything else in the stairwell outside our apartment. If I don't put the things away immediately, he complains about what the problem is with…