BOBSweep PetHair buying plus

Product Name: BOBSweep PetHair buying plus
Robotic pet hair vacuum and mop with manual, docking buying station, programmable remote, extra main brush and area blocker. Still functional, vacuums well. Only thing is that the screw for the side brush is missing and I can't find one to replace it. Side brush itself is included, if you have a screw that fits it will work perfectly. Main brush is Ok and I've included a brand new replacement. Vacuum is NOT clean!! I've emptied trash can and wiped the surface but didn't throughly clean it. Definitely signs of use.