I recently bought a used trekking bike (Focus) to commute to work in Berlin.
It's a great bike, and now that the weather is a little wetter I'm finding that the fenders it came with aren't quite covering the wheels like I would like. About every two weeks they come out of alignment and I have to adjust the screws/bend the stays to get it to cover the wheel again.
Any tips for getting them to stay put? I've adjusted them three times now and it's getting old.
EDIT: I'm not sure the exact brand/model but the rear has 1/2 diameter coverage and the front has about 1/3 diameter coverage.
Material: black plastic
Attachment system: like these:
Or these Planet Bike ones: