i have someone coming to work on my house tomorrow and i was on the fence if i needed to be careful around the sprinkler heads, i don't plan to use it so if it's broken, i don't care but if it works i'd like to keep it working in case a future owner wants to use it.
if that little plastic door is too much for you, let your husband give it a try.
drill the lock out. start with a 1/8" bit and work up to 1/4, 5/16. stick it in where the key goes. just make sure you don't penetrate too deep or you may damage wires or worse, 