Canon S400 User Manual page 18

If any foreign objects (metal or liquid) enter the printer, turn off the printer, unplug the power
cord, and call the Canon Customer Care Center.
Getting Help From Canon
Cleaning the printer
Use a damp cloth to clean the printer. Do not use flammable solvents such as alcohol,
benzene, or thinner.
Continued use of the printer when a foreign object has fallen into
the printer could cause a fire or electric shock.
If flammable solvents come in contact with electrical components
inside the printer, such substances could cause a fire or electric
shock.
Safety Precautions
Introduction 18