We like a soft brush and Dow Bathroom Cleaner, aerosol with “Scrubbing Bubbles” and that seems to work on most everything to some degree, except rust. The latches are in need of tweaking as they mentioned, and they cam arms are needing tightened. The latch stem could be bent also. That is probably a Detwiler Hydraulic plate, SO PLEASE Check the four stem bolts that are around the center Ram for tension. Make sure these are kept tight, as they loosen and the plate ceases to function. Thus requiring an expensive rebuild. Detwiler will help some on the rebuild, and you should eventually plan on it. Though preventive maintenance will end this also. BCB