I'm having a very difficult time with seals on my 06 YZ450. I've had them changed by MX Tech and two other experienced wrenches. We've tried OEM and MSR seals. Forks have always been inspected and either dressed up or were OK. The longest they've lasted has been 7 rides. Usually one side will leak a little but my latest outing (mud ride) both sides leaked and one bad enough to cover the caliper. I'm 230 lbs and tend to land hard and wonder if that's the problem. Any advise would be great. I'll start with the film trick as I do see lots of dirt under the dust seals.