What is the clay mate?
Clay mate like a kind clay lubrican if you take water about 3/4 of spray bottle and take a piece Clay Mate into spray bottle. when you wash car.
the funcation also same as clay lubrican. 

safety: Ph7 of the clay mate; let clay bar work smooth 
shine: quick detail; let clay move contaminants easy and safety

Wipe the area with a microfiber towel and use the clay lubricant to remove any clay residue. Rub your fingers across the paint now; it should be as smooth as glass. If it’s not, repeat the process. Reshape the clay bar as needed to expose a clean surface. Keep the clay well-lubricated.
Gently rub the clay bar back and forth across the wet area. It will grab at first. This means that it is pulling contaminants out of the paint. When it glides
freely, the paint is clean.
Detailing clay does not remove oxidized paint or fill in blemishes. If your paint is mildly oxidized, clean the paint with clay and then use a polish to remove the oxidized paint. If the oxidation is severe, polish first because the oxidized paint may flake off as you clay and ruin the clay bar.