[Puck Luck]

Very interesting. Never thought about taking it apart for a cleaning.
But regarding step 5 and 6. When ever i initially go and check the DTC for srs, 90% of the times its under temporary dtc, not permanent. Meaning, the code was tripped at one point earlier and is currently not being tripped and working ok at the moment. I usually reset the light and send the customer on his way and let him know that he will need a new seatbelt buckle. It could be days or weeks or sometimes months before the light comes back on again. And that was just resetting the light without any attempt of cleaning.