How I can fix my blury lens and clean my sensor?

My Fujifilm x10 has a blury optical viewfinder and there's always a black point on any picture, so i think this is because i have some desert on my sensor. Do you know how i can fix that two things?

Many thanks!

crwdns2934089:0crwdne2934089:0 crwdns2934093:0crwdne2934093:0

crwdns2934109:0crwdne2934109:0

crwdns2889612:0crwdne2889612:0 0

crwdns2942205:01crwdne2942205:0:

You can also answer in german if you want!

crwdns2934271:0crwdnd2934271:0crwdne2934271:0

crwdns2934285:0crwdne2934285:0