This used to happen to me all of the time during my early cleaning years, I''d leave my chemical bottles behind in the room I had cleaned. These days that happens a lot less, I do always check behind myself just incase but for the most part everything stays pretty organized and together and that is due to the simple act of either putting things back immediately after I am done using it.. like in my cleaning caddy for example or if I'm cleaning a separate shower and tub then when I get done with the chemical and sponge I put it where I will use it next. When I'm almost done with an area I will move all of my supplies to where I will be needing them next. That way whenever I'm ready to go, my stuff is too!