thanks to all knowledgeable guys for sharing! now i have a better understanding.. but as some mentioned simple green and lubricant, i am still curious as to how the simple green can get rid of mud or sand stuck inside the tiniest part of the brushed motor and it is the lubricants which usually attracts all the dust and sand ...
I tried using air compressor for the fine sand particles, but those deep inside the electronics are impossible to blow them out.
As some mention to remove all electronic items from chassis before cleaning, so that means basically after every run, you guys will dismantle everything and rebuild them after cleaning?
Is there a simpler way so i dont have to remove and build everything back? For lazy bums like me? heh