I've never had a problem if I use it as directed: Keep the back pad against your head at all times!
I shave my face and then stick my head under the faucet with hot water. I then use Headslick shaving cream or Mach 3 gel and lather up. Shave as directed, and in about five minutes, I'm done.
I shower, wash my head (with shampoo - soap dries your scalp) and then finish the shower with a cold water rinse on my head to close the pores. Get out. Dry off. Apply headlube (or other lotion if head is dry/sunburned).