Do I need to Vacuum up pet hair, etc before I use one of these Bissell Upright Steam Cleaners. I was going to purchase a new Bagless Bissell Pet Hair removal vacuum and the aile over I saw the Bissell Pro Heat cleaners for like 100 bucks more. Can I just get rid of my vacuum and use this steam cleaner instead or do you still need to vacuum before you clean. Or can I use steam cleaners without the water now and then just like a vacuum?