Quoted from ForceFlow:Whoa, no, don't do that. They are too fragile for a dishwasher. It's a wiring harness that some people put in a dishwasher.
I usually use simple green and a soft toothbrush. Then rinse in warm water, rinse with a little bit of alcohol to displace the water (not too much or it will leave residue behind), then blow it off with compressed air, and then air dry.
I also use simple green and a tooth brush .. let it sit for a bit like 10 minuets and then wash it out with warm water, and dry it with a hair dryer. After all the water is out i let it sit for a day to dry out more. And make suer their is no water on the pcb.