First, remove the interior cover by removing the two screws.
Next, unscrew the two bolts holding the two sides of the lock together.
Unplug the wire connecting the outside to the inside and remove both sides from the door.
Remove the six screws attaching the outside housing
Lift off the silicon keypad cover to reveal the circuit board underneath.
On the circuit board below the keys, you can see the residue on several of the button pads. I didn't have any alcohol or electronics cleaner handy but I did have some brake cleaner so I squirted a little bit of brake cleaner into the spray can cap, dipped a q-tip in the cleaner, then just wiped off the residue.
Before |
Residue Removed from Circuit Board |
After |
After everything was put back together, it works just as good as new.
----> Fixed in 15 minutes for $0