You can remove the wiper arm easily and simply cover up with a grommet, not a big job at all. The jet is a pain if you want to remove all the pipe as it goes behind the head lining, down the drivers side pillar and through the firewall to the washer bottle. You will have to bung up the washer bottle anyway so the easiest way would be to remove the nozzle from the rear screen and bung it up there and cover the hole with another grommet.