hI i'm nEw here... but can sum one tell me how to clean a motor... my tomy 2.6 motors likes to jerk a bit(without gears)... is it cuz its dirty... or is it just my motor suks ah... and my gear on my axle is barely touching the other gear... when i reverse is gets locked up... and sumtimes it doesnt touch at all(when runnin)... can sumone help me??