It is sad that in a global company we must deal with such matters, but it seems that there are always people who do not know how WC-cleaning functions. Here is a bit of help.
Figure 1. Totally Wrong. Figure 2. Wrong. Figure 3. Almost Right. Figure 4. Right.
Hands Spread Disease-Causing-Germs. Correct Washing Protects. Hold hands under running water. Pulverise soap* (*or similar hand cleaning substance) for 20 to 30 seconds. Also between the fingers. Then thoroughly rinse. Dry Carefully. Brought to you by the Us Against Viruses campaign, the Robert Koch Institute, and the Federal Center for Health Instruction.
Rule: The Complexity of Instructions must be in Inverse Proportion to the Simplicity of the Object to be Operated. (see also shopping trolley instructions here)