Dear Home Ec 101:
So, uh, how bad is it if I add a little liquid dish detergent when I’m running out of laundry detergent? I swear my momma didn’t raise me this way.
~Bubbling in Beaumont
Chances are, if you have some laundry detergent to add to a load of laundry you probably have enough. However a very small amount of dishwashing liquid, not dishwasher detergent, would not cause harm, provided you are using a top loading machine..
Anything more than a small amount would cause excess foaming which may spill out of your machine and onto the floor. This may be mildly amusing on a sit-com, but as I don’t have someone else to clean up the mess, I would be less than thrilled.