I have a Shimano Saros I bought a couple months ago. I've had it on the water about a dozen times. The last few times out its been feeling a little stiff. I've had other spinning reels do this but only after several years of service. If I removed the spool and spin the reel backwards it will work itself out and will work nice and smooth like new again. Last night I had to do this 3-4 times in just 3 hours of fishing. When it first started a week or so ago I tore it down, cleaned it (still looked new and clean inside) and lubed it up. Didn't make a difference.

Any suggestions?

Definitely no line or hair or anything caught up behind the rotor or one the main spool shaft? Sounds like there's something gradually wrapping itself tight stopping it turning freely.

I think I'm going to open it up again tonight and see if I notice anything out of place. Its a beauty reel when it works.LOL

Sounds like you might have line or something raped in the reel

Would you describe it as 'binding'?  If so, a search of just this site will give you lots of discussion about Shimano spinning reels binding, particularly Symetres.

This is the only thread I've seen where the owner seems to have 'fixed' the problem:

http://www.bassresource.com/bass-fishing-forums/topic/140041-shimano-symetre-binding-follow-up/