Tuttnauer 1730E, Operation & Maintenance Manual

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21. If spotting is detected on the instruments, the first step would be to use an
ordinary eraser to remove the spot. If there is no pitting under the spot then
the spot was only dirt. Dirt spots on an instrument may be an indication that
the autoclave needs to be cleaned or that the instruments were not
adequately cleaned or dried. If removal of the spot reveals pitting, the spot
was most likely rust. Rust spots on an instrument are not uncommon on
inexpensive instruments. It may also be an indication that the instruments
were rinsed in tap water with a high content of minerals. These minerals,
when exposed to high temperature and steam, will accelerate the oxidation
of the metal. One suggestion would be to final rinse the instruments in a
distilled water bath.
22. If the instruments exhibit a discoloration, this can be due to the mixing of
carbon steel and stainless steel. When these two metals come into contact
with each other an electrolysis occurs that breaks down the metal. The best
solution is to separately wrap the carbon steel to insulate it from other
instruments or the trays.
23. Items should not be allowed to touch the walls of the Chamber as the hot
metal can damage the item.