If both wheels are eating the pads I would be looking at the entire braking system rather than a sticking caliper. Perhaps something in the valve block is keeping some pressure on the fronts causing them to wear. Jack the front up and apply and release the brake. Check to see if there is resistance in spinning the wheel. How does the fluid look? Contaminated fluid can expand and cause some pressure on the calipers. Jack it up when the vehicle is hot and spin the wheels. Just a few things to try.