What is the rule when waxing - do you have to use a new spatula each time you apply wax to any part of the body?? When I did my training we used the same one for each client then just binned it at the end of treatment, but since I have heard that it is a big no no due to cross contamination. I am just starting out and still practising on friends but wull be going out into the big wide world soon and don't want to be pulled up at the first hurdle. What's the right way??