If I ask you to pick something up or clean something up, and you say any of the following:
"I didn't use it/play with it/take it out/eat it/drink it/spill it/make that mess" or any variant thereof,
steam will start to come out of my ears and I will insist that you not only do the job I just asked you (nicely) to do, but that you do a second chore as well.
I clean up plenty of messes I didn't make, every day.
A word to the wise: just say, "OK, Mom" and do what I ask.