Yes i use oil,
it creates a lipid barrier between the wax and the skin,
you put 1 or 2 drops into your palm and apply it to the area you are going to wax,
you only need a very small amount so if you can see it shining on the skin just blot it with some tissue or couch roll,
the wax will grip to the hairs rather than the skin when using an oil and it makes it more comfortable for the client hth