Find out what the wet is before you spread it
A dark patch on plywood can be mop water, a spilled drink, a leaking trash bag, or oil from a machine. Those are not the same cleanup. Smell and look before you wipe. Food waste and ordinary dirty water from a mop bucket still do not belong in a storm drain, but they are a blot-and-bag problem you can usually put in the disposal bay as trash. Paint, oil, gasoline, solvent, coolant, and anything you cannot name are a stop. Do not hose them through the floorboards. Blot with rags. For the hazardous ones, bag the rags the way the household hazardous-waste program tells you, and tell the rental counter what you think it was. Hiding a wet patch under a dry bag is how the next person finds a stain and a smell together.
Water still damages a floor if you flood it
Even a harmless spill should be blotted, not flooded. A hose swells the plywood, drives dirt into the seams, and leaves the box wet for the return. The inspector then has a soaked floor and no way to know what the liquid was. Press rags or towels, wring them into a container if the liquid is ordinary dirty water, and empty that container where the attendant says waste water of that kind can go. Do not empty it in the landscaping. Open the doors and let the remaining dampness air while you are still outside. Do not close a wet box and park it in the sun as a sauna. A wet furniture pad in the same spot needs to come out. Hang or spread it the way the rental company tells you. A mildew problem is not a broom problem.
Say the truth at the counter
If the floor is damp from rain that blew in, say rain. If a trash bag leaked, say that, and show that you removed the bag and blotted the spot. If you do not know the liquid, say you do not know. Do not call oil 'rain' because rain sounds cheaper. Do not invent a fee either. The contract decides charges. Your photos from the site show the spot before anyone argues about when it appeared. Take them in daylight if you can. A night photo of a wet floor looks like a shadow. Use the flashlight at an angle so the sheen shows. Then sweep only the dry grit around the spot. Mixing dry sweepings into a chemical wet spot makes a bigger contaminated pile. Keep those sweepings out of the ordinary bay until staff or the hazardous-waste program tell you where they go.
Before you go
- Identify the wet spot before you wipe. Stop if it may be paint, oil, or a chemical.
- Blot ordinary spills. Do not hose the plywood.
- Bag hazardous rags the way the hazardous-waste program describes.
- Tell the counter what the liquid was, or that you do not know.
Hosing a mystery wet spot through the floorboards so the box looks dry at the return.
Questions people ask
Rain blew in through the door. Do I need to report that?
Blot it and air the box. If the floor is only damp from rain and there is no stain or smell, say that if they ask. If you are unsure the water is rain, do not rinse it away to test the theory. An honest damp floor is easier to explain than a rinsed chemical.
Can I use a wet-vac?
Only on ordinary dirty water you will empty where the site tells you. Do not vacuum gasoline, solvents, or unknown chemicals. A wet-vac contaminated with those is its own disposal problem. When in doubt, blot and ask before you suck the spot into a machine you then have to empty.
Search Dumpmapper by ZIP code or city, then call the site before you load the truck. Hours and accepted materials change.