I have been seeing many signs that say slippery when wet. Usually it is the floor inside the building particularly the mall. The maintenance guy said that they are using soap and water to clean the floor with the mop. That is to disinfect the area in case there is a stray virus on the floor. I think that is a good precaution especially when there are kids that go to the place.
However, those maintenance guys should be very careful with the signage that they place for the public to be careful. Once the sign is not read you can imagine that the floor is really slipper with the soapy water from the mop.
Do you mop the floor regularly?