Clean out the existing maxi-paw with a hose. Unscrew the innards with the wrench you've bought at the home depot. Replace with new guts from a new maxi-paw. No digging needed in most cases.
I am having trouble getting the guts of Rain-Bird Maxi-paw out of the casing. I am using their special wrench but the corners where the wrench is supposed to grip have worn out and become rounded - so no hold. Question: short of breaking the guts ( I'd rather not damage the pipe connection the outer casing) is there a way to dis-mental the guts of Maxi-paw from the top? All suggestions appreciated.