If your agent is showing you the data that MLS hits aren't translating to showings, or showings aren't translating to offers, or feedback that shows little interest, like advertised Open Houses with no activity, then it's likely not your agent, not because a lawn isn't the exact right height, and nothing to do with a more timely carpet vacuum.  

The property:I've found a C- property (with new, bad paint job, new cheap carpet and flooring) in a C neighborhood in a college town. 

I was surprised since most places roll up the carpet that time of year. 

Have you used Matthews & Perlo carpet SP 300?

I change paint and carpet but still i feel some smell in room.Looking for Ozone generator, anyone recommend any particular model..?

She also stained the carpets so that was additional.

So, with normal turns (fresh paint, carpet cleaning, etc.) you can rent them out for much more money.  

Can you handle the loss of income when a tenant trashes $3,000 in carpet?

For the items you mentioned, I'd recommend changing out the carpets if there are stains, holes, burns, etc.

Carpet, cabinets, tile, lights, etc.