Loose bearing caps

They keep coming loose. Any ideas as to what could be causing this? I’ve just been riding it around normally, and it only started recently (past 2 rides).

26" torker, and normal riding = various ~3 mile routes around campus which involve roughly moderate hill climbing / descending and awful, awful sidewalks that sometimes end for no reason or drop off to the road without any sloping whatsoever. Mike Rotch says “ow”.

Are they not tight enough? Are these caps on a really cheap uni with cheap chromed bolts? I’ve seen similar ones that would loosen easily.

A dab of blue Loctite should put a stop to them coming loose.

I used to have this happen, I added some split washers and they stopped loosening off.

Blue loctite would work as well.