The Philips OneBlade is equipped with a blade-wear indicator. This means that with use you will see a green patch develop on your blade. Once this patch is completely green, it is a signal for you to get a new blade. Please keep in mind that this is only an indication and you should replace the blade when you are not satisfied with its performance any more.
One of the reasons for the blade turning green quicker than expected is improper cleaning. Cleaning tools such as brushes, towels etc. or chemical liquids can cause early visual wear.
Please follow the cleaning instructions below for OneBlade:
After every use, blow off any hair accumulated on the blade.
Turn your OneBlade on and rinse the blade and comb(s) with lukewarm water.
If the attachments need to be cleaned more thoroughly, turn the OneBlade off, take off its attachments and wash them under a tap.