What is a good degreaser for use on equipment?
A 50/50 mix of Dawn dish washing liquid and water will degrease almost anything. Some water is required to carry away the grease residue, so don't try using straight Dawn.
Rules for the use of cleaning equipment depend on the type of cleaning equipment is being used. Using the equipment safely would be a general rule. Keeping the equipment clean and in good condition is another general rule. Other general rules might be storing the equipment properly, storing chemicals properly, and using the correct chemicals.