Diagnosis
Reduced motor performance. Primary cause is a worn-out or obstructed brush head.
How to Fix It
Replace the brush head with a new, official Quip refill head. The internal magnet and drive mechanism wear over the recommended 3-month period. A fresh head restores full vibrational transfer.
If That Didn't Work
Inspect the metal drive pin on the handle. Ensure it moves freely and is not stuck with debris. Gently clean it with a dry toothpick. A stuck pin cannot transmit the motor's full motion.
Heads Up
Using non-Quip brand brush heads can cause poor fit and significantly dampen vibration. The connection is a proprietary magnetic and mechanical coupling.