Crap in your car

Why is is turning weird?, it seems slow? here's why,Hair and debris in your axles and bearings. Take a look
                                     Clean these with an Xacto knife and tweezers

 WARNING! The next steps may void your warranty!
Take apart the Chassis by removing (2) long screws up front and 4 more towards the rear
Then Gently lift the motor from the back end, pulling out the axle as shown

 The bearings will slide enough to easily clean out the crap around them, reassemble and enjoy more speed! Note: the two motor wires are Enameled but strong, be careful not too scratch them or you can short all kinds of stuff, Very Bad