Philips trimmers SUUUUUUUUCK.
I had an electric trimmer. The plastic attachments for the various shaving grades were fixed at each end with the smallest possible fragment of plastic. So as you're going over the curves of your skin, those tiny plastic fragments were guaranteed to break before long, rendering the entire trimmer useless, even though it technically still worked. Ordering replacements, which were guaranteed to break, was more expensive than buying an entire new trimmer.
Switched to a different brand and no problems whatsoever.
There's no way a group of people working for Philips sat around designing that shit and didn't know it was designed to break. Planned obsolescence. Fuck Philips.