Multiple choice What is NOT a method of cooling the skin used with IPL Applying clear water-soluble gel using a device with a chilled crystal tip using a device with an air cooling mechanism Submerging the treatment area in water during the treatment Reveal answer Fill a bubble to check yourself D Correct answer Explanation Submerging the treatment area in water during an IPL treatment is dangerous and not a recognized cooling method. Proper methods include gels, chilled tips, or air cooling.