Safe and approved methods forcleaning machines/equipment are

There are three main items of cleaning equipment used in the garage:the cleaning bath (or tank),the pressure washer and the steam cleaner.
The cleaning bath uses a chemical solvent,this is usually used for cleaning dirty/oily components.
The components are submerged in the solvent and dirt is loosened with a stiff-bristled brush.
The pressure washer is used for cleaning the mud off the underside of vehicles; water at very high pressure will clean off mud. For hard-to-remove dirt detergent can be added to the pressure washer.
The steam cleaner,often referred to as a steam jenny (jenny  generator),produces hot pressur- ized water with the option of detergent. This is used for removing very stubborn grease and dirt, like that found on the underside of high mileage goods vehicles.
If you are cleaning an engine or electrical equipment it is important not to get water inside. Before cleaning inside an engine bay with a pressure cleaner the electrical components and engine inlets should be covered over with polythene.
When cleaning portable electrical appliances be careful not to get water on the plug,this could cause a short circuit.
The mechanical parts of fixed machines may be cleaned with solvents,then dried with absorbent paper towel.