I'd take the crank off using a crank extractor (Halfords sell one for about a fiver if no-one has one to lend), degrease the BB spindle and the crank area where the spindle enters, do a light re-grease back on the spindle and reassemble.
Give it a week and retighten the crank bolt if required, then (touch wood) all should be well!
I'd take the crank off using a crank extractor (Halfords sell one for about a fiver if no-one has one to lend), degrease the BB spindle and the crank area where the spindle enters, do a light re-grease back on the spindle and reassemble.
Give it a week and retighten the crank bolt if required, then (touch wood) all should be well!