I check them almost weekly, torque to about 90 ft-lb. They're almost always tight when I check them (may be a couple of ft-lbs off). I've had this problem for a while now, different sets of tires w/ multiple balancings. I'm not sure if this is related, but when I accelerate while going over a knoll I get a bad vibration through the whole car, but not in the steering wheel????

1999 Contour SVT #1966/2760, Silver Frost/Midnight Blue Koni Kit, Mille Miglia MM-S rims, B&M shifter, Stazi mesh, SFCs, optimized Y-pipe & TB, SS break lines, K&N drop-in, Infinity Kappa speakers, MTX amp/sub