Just doing a bit of maintenance on my pedals; normal things such as tightening back plates & knobs, securing velcro/rubber feet, screwing down any loose input jacks, contact cleaner on footswitches...
I get to my Green Russian Muff and it was shipped with a battery which is still inside, two years expired! Fortunately, the battery hadn't leaked and it was still in one piece. Just a word of warning for anyone who has purchased an EHX pedal recently.