If you can't fix it, maybe just don't use the brake. I put my manual transmission P5 in 1st or 2nd gear when I park it and I don't set the brake. I learned as a kid that this was a valid option and I've never had a problem in 21 years. If you've got an automatic, you can put it in Park, of course. If it's hilly where you live, you can cock the wheels and let the car gently roll into the curb and then leave the car in Park or 1st gear.