There are 2 parts to this. The first deals with how the crystals are applied. The 2nd deals with how they're treated after.

Before applying the crystals, always make sure the skin is smooth, freshly shaved or waxed, dry and clean. This helps the adhesive stay on best regardless of which skin-safe adhesive is being used.

How you wear your vajazzle affects how long the vajazzling lasts. One important tip is to wear looser clothing around the area. If it's summer, then wear a bikini that sits low. Remember that reputable professional vajazzlers will guarantee the crystals to last 5 days.