We have a small puddle that keeps appearing on our basement floor in the laundry room. It seems to appear for no particular reason.
It's at least 3 feet away from our freezer and at least 4 or 5 feet away from our washing machine. There's no visible trail from any water source to where the puddle usually appears.
The first time it appeared a couple of years ago, I thought it might be condensation from the furnace ducts above, where they join. I wrapped a small towel around it and checked on it periodically. It was never wet. And the puddle stopped appearing.
I thought that perhaps there was a leak in the kitchen floor. Our kitchen is above the laundry room. However, the laundry room ceiling is unfinished and the wood is dry as a bone.
The copper pipes in the ceiling are all dry. No leaks.