Our patented blades are designed to vacuum the hair into the blade chamber as you shave allowing you to shave anytime, anywhere with no mess. What happens with old or clogged blades is that the motor will work extra hard trying to spin the blades which can cause the motor to bog down or fail completely. This is why we recommend cleaning your blades thoroughly after every shave and replacing blades every 3-6 months to optimize the performance of your shaver.