Completely remove all dirt and debris from the vehicle, especially in the suspension, drive shafts and steering parts.
Inspect each part and screw for loosening, missing parts or damages.
You should always make sure your wheels are tight and parts move freely after and before use. Apply fine grease for plastic gears wherever needed.
Do not use aggressive chemicals or solvents for cleaning, otherwise the electronics and plastic parts might be damaged. Use compressed air for cleaning, a soft paintbrush or toothbrush.
