I currently have an OTR microwave that is externally vented The exhaust vent for the microwave is concealed by cabinets above the microwave, and inside the cabinets the ducting itself is concealed by a box constructed of the same material as the cabinets. The ducting is completely concealed, with no visible fasteners.
I'm looking to access the ducting to clean the inside (the suction from the exhaust fans is not great, I'd like to make sure there aren't any blockages).
But here's the catch; I rent, which means I can't remove/destroy the covering without violating my lease.
Is there any other possibility for me to access the ducting? For reference, my microwave is a GE model jvm1540lm5cs.
Also, any other tips to improve the exhaust efficiency would be appreciated.