Wrap up any electrical components or such with plastic bags & use rubber bands. I use engine degreaser in a spray can it costs a quid & is real good stuff from the pound shop, & for the lack of a steam cleaner jet wash off once sprayed on. Leave the engine to dry for an hour, also its best to do this not with a hot engine. Check after this time that there is little or no water in or around the electrics otherwise the engine will not fire correctly. Dry of with a rag if you must