We know it’s tempting to assume that your aesthetician will take care of everything for you, but there are certain ways you should (and shouldn’t) prepare for your appointment that may make the difference between great results and a waste of your hard-earned dollars.

According to Marie Claire, it’s never a good idea to use products containing Retin-A, retinol or hydroquinone in the three days prior to your peel or laser treatment (make that a week if it’s a wax). All of these ingredients tend to sensitize your skin, and can result in all kinds of nasty, unwanted irritation.

On the other hand, it is important to make sure you keep up the rest of your normal skincare routine to increase the likelihood that she’ll grasp your condition and you’ll make away with the best results (and the best advice for keeping or ditching your habits).

Before your appointment, make sure you’ve washed your face thoroughly and applied toner and moisturizer. It’s always a good idea to stick to the brands and facial products which have already proven themselves on the market. Your aesthetician will probably wipe off all your products, but it’s important that she sees the normal condition of your skin.