Be systematic. Replace or grease one thing at a time and work your way towards the issue. Obviously check for play and gritty bearings etc first, then anything loose like chainring bolts etc. Start with the cheapest easiest first.
My last creak ended up being a loose spider. Drove me insane for half a year with multiple pedal services and fresh bb before finding the culprit randomly.
Be systematic. Replace or grease one thing at a time and work your way towards the issue. Obviously check for play and gritty bearings etc first, then anything loose like chainring bolts etc. Start with the cheapest easiest first.
My last creak ended up being a loose spider. Drove me insane for half a year with multiple pedal services and fresh bb before finding the culprit randomly.
Bikes are lovely like that