I've been riding about 10-15 miles a ride and every other ride by the end I'm squeezing the front lever to my fingers (brake 1 fingered) and almost no stopping power and have to rely on the back brake to stop. Both brakes have been sent to Tektro for warranty repair through the lbs, but the problem persists. Is it time to just give up and buy a Shimano set? I'm leaning super heavily that way.