The high pressure wash could force water past the connector seals and into the electrical connections on the cable and sensor. I’d want to disconnect each one and make sure it’s bone dry inside both the plug and socket, check there’s no sign of any residue, corrosion etc on the pins and socket at the same time.
id wash the contact cleaner off sharpish too. They can leave a residue on plastics (cables, connectors, sensor case etc) that holds dirt and eventually damages the cable insulation. (Same with stuff like wd40).