Upholstery attachment barely spins and stops

I can’t see any clogs and can’t seem to get it open. There are three screws but they don’t really loosen anything.

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

crwdns2934109:0crwdne2934109:0

crwdns2889612:0crwdne2889612:0 0
crwdns2934285:0crwdne2934285:0