Do you clean cameras and objectives? I have a grey spot on my pictures with ceiling because of dust. Its a Nikon

There is a special section of the shop that does this, please contact customer service for more details.

I DONT BELIEVE THEY DO MAINTENANCE, BUT THEY WILL TELL YOU HOW TO CLEAN IT, IF YOU TAKE THE EQUIPMENT IN THE STORE

I don't think they do

I use a blower to use air to remove dust. I have Sony mirrorless cameras. Not sure if it works for Nikon.