four months Similar to manual blades, your blade will become blunt over time, and this may result in reduced shaving performance and an increased hair pulling sensation during shaving and trimming. For optimal performance, replace your blade once every four months.

Introduction. If you have a Philips Norleco face shaver and are noticing that it is becoming less effective, you may need to replace the shaving head blades with new ones. These heads contain small blades that dull over time. Philips Norelco recommends they be replaced every 12 months.

every 12 months To get back to 100% performance, replace your shaving heads every 12 months.

12 months For best shaving performance, replace your shaving heads every 12 months.

five to 15 years An electric razor or epilator is a significant investment for your grooming routine and they can last anywhere from five to 15 years, depending on the brand you purchase. To prolong your electric razor's life, wash or brush any loose hairs away from the foils and blades after every use.

All major manufacturers recommend you change your shaving heads every 12 to 18 months, with daily cleaning. For Braun, Panasonic, and Remington foil shavers, this means changing both the blades and the screen or foil at the same time.

How do you know when it's time to change the blade?

1. Your razor doesn't 'glide' over your skin anymore. You know how a fresh-from-the-pack blade glides over your skin with ease?
2. You won't get as close a shave.
3. You get more ingrown hairs.
4. It's started to rust.
5. The blade is damaged.

Well, this should always be based on the number of shaves, not the number of weeks. Ideally, you want to change your razor blade after 5-10 shaves. Gillette actually recommends 5-7 shaves, but this is just a general rule and it actually comes down more to the thickness and density of your facial hair.

Once the blades are clean, it's important to replace the oil on them. The key to keeping your blades in the best condition is to add a drop of oil after each use, according to DeAngelis. Apply a drop of oil to each cutting surface, and run the shaver for about 20 seconds, to spread the oil around.

Regardless of whether you're using a rotary or foil razor, the cutting elements will eventually wear out and will need to be replaced. Failing to do so will result in poor performance. Never try to squeeze another shave or two from a dull blade or worn foils.

12 months Replace your blades every 12 months For best shaving performance, replace your shaving heads every 12 months.

The best indicator it's time for a new razor blade is dullness. If your razor blade pulls at your hair, feels rough on your skin or you notice more post-shave skin irritation than normal, it's time to replace it. How frequently you need to change your blades really depends on how frequently you're shaving.