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I am somewhat reluctant to mention this as there are a lot of A&P's here that probably know better, but I will merely advise what has worked for my like gear problems in the past.
a) Open the doors
b) Wipe all the switches off with a clean rag
c) Spray the switches with a degreasing compound
d) Blow air on the switches with an air compressor.
e) Wipe them off again
f) Spray them with WD40.
My experience has been that the switches are so sensitive that a bit of oil, grease, sand etc... has a tendancy to make them finicky. Keep them clean and lubricated, and it will potentially help with their operation.
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