Hi guys, I was out on a photoshooting trip today with my 400D. During mid-trip, I realise there is a dot between the top and middle AF points and a small 'c' dirt from the viewfinder. I assume it is on the viewfinder since the pictures I took have no dots. I tried the dust blower on the view finder but the dirt still there, so I drip the lens solution on the cotton bud and clean the viewfnder, then wipe clean with the lens tissue wrapped around a cotton bud. I found that the cotton bud turns black after wiping.
Am I supposed to clean the viewfinder using this method? What is this black thingy on the cotton bud? Is it some special chemical on the viewfind? Can't be dirt right?
Even after cleaning, the stains still there in the view finder. Should I send for servicing at canon? May I know how will be the charges like?
Hope fellow CS-ers can help me. Thank you!