K&F Concept CK02 16mm APS-C format cleaning stick set (16PCS cleaning stick + 20ml cleaning liquid bottle + PU coated palm dust-free rubber gloves)

SKU: SKU.1647

Could I use this to clean the focusing screen and the mirror (not the sensor)?
Answer Question
In my case I did clean the mirror with cleaner and it worked fine. My camera does have a focusing screen, because of the design, and I would be very careful with that screen. This is based on other older film cameras, I would just use a blower or a fine brush.
I don't see a reason why not, as long as you use the same procedure. Only issue would be the size of the mirror vs the size of the swab, but you could get by by overlapping