While I was still working we had an overly obsessed supervisor that used to make an annual job of hosing out the shop. He would drag his own garden hose to work and make us shut down machine shop operations and he would do his housecleaning thing......To use sweeping was all we needed to do as you could nbever see much of a difference in his hoseing it al down anyhow. So this one day he drags in his hose, and tells us tomorrow is cleanup day........fine, so before we left that night after work, and after he wa gone home. we filled the hose up with a super concentrated detergent. He never used any detergent before, and the shop had no floor drains either, so he always had to squeeze the entire floor and use a mop to get all the water up. We even spilled this concentrated detergent on the concrete and left it dry, then it was un noticed the next day. He starts to hose everything down and was soon inundated in knee deep soap suds, which he played heck getting rid of. His one day affair turned into 2 or more days of getinig it all out.