Paul from SWISCO responded:
May 5, 2015
I'm not sure what you mean. The 90-193 does not slide since it's screwed directly on. To clean it, it would be best so remove it entirely.
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Paul from SWISCO responded:
May 19, 2015
The 90-193's screws are exposed so you just need to unscrew it to take it off. If you do not have screws, you likely do not have the 90-193. If that's the case, take a few pictures of it for us to see and we can offer a suggestion.
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