The unit is less than three months old. It started making this whistling/screaming noise a couple of weeks ago. the noise is coming from the small hole on the side of the lift-away canister. I've taken the vac apart and cleaned all hoses, the filters, and the bin. I also cleaned the hair off the roller. Thus far, nothing has solved the problem, and I'm having problems finding help online. Any ideas?

Vacuums - Shark - Navigator Lift-Away Bagless Upright Vacuum, NV351