Batters should be prepared as quickly as possible
O in small batches so that foods spend less time in the TDZ
by master chefs who have been trained in preparation of egg-based food items
O away from direct sunlight

If it's a smaller child or infant, place one on the middle of the chest and on the child's back. (if it is a bigger child with enough room for two, place one on the upper right/your left of the chest, and one on the lower left/your right) the pads should never touch each other. 

What do you mean exactly

Making sure the equipment is cleaned daily and insuring proper hygiene is kept up with the working staff.