Funny thing if you can submerge the plug portion into a bucket of water and nothing will happen - no sparks, no excitement, nothing. Basically the EVSE and car have to talk to each other and check that everything is safe before the electrons flow. Just keep debris from gumming up the plug/socket. I actually had a big moth get squashed once because he was attracted to the LED light at the end of my EVSE cable. Air compressor and a few bursts fixed that.