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In addition to reading a few tutorials on corrector removal and cleaning, here's a variation I've used for minimising the amount of contact cleaning needed:
With the corrector removed from the tube I covered the secondary housing with plastic and elastic bands, then sprayed cleaning solution/isopropyl onto the glass, then washed it off under a running tap, with the water stream hitting the lower half of the plate to avoid forcing water against the secondary housing.
This gets rid of the majority of particles and reduces risk of scratching with subsequent cleaning steps.
The main risk is dropping the corrector during handling - need to go slow.
I tried it with a C6 first and it went fine, then with a Meade 10" and 12". The entire housing comes off the C6 while the corrector has to be removed from the housing on larger SCT's. Moisture in the seams around the secondary housing can be removed with a hair dryer (not on high heat) or by sealing the corrector in a plastic bag with dessicant for a few days.
I wouldn't bother removing the corrector if the inside didn't need cleaning.
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