You should remove the lower air deflector, disconnect the electrical connector from the washer solvent level sensor switch, place a pan under the area where the level sensor will be removed to retain the lost solvent, drain the washer solvent into a suitable container, pry outward the washer solvent container level sensor switch from the washer solvent container and remove the washer solvent level sensor switch from the container and the washer solvent container level sensor grommet from the washer solvent container and discard.