Bissell Crosswave model 1785

SaferProducts.gov consumer incident report 20210224-C77D2-2147365683. Severity: Incident, No Injury. Product: Bissell Crosswave model 1785 (Bissell Crosswave model 1785). Incident: Purchased a Bissell Crosswave (model 1785) in Dec of 2017. Had numerous problems with 1st machine, including giving me a small, stray electric shock when touching the revolving floor brush with machine plugged in, even though the machine was turned off. Bissell replaced the 1st machine. Second machine had several slightly-different problems in addition to the same small electric shock problem and failed within 6 months of replacing the 1st machine. Over the course of our two-year warranty from Bissell they replaced the second and third machine under their warranty. Fortunately we purchased an extended warranty through [REDACTED] when we purchased the original Crosswave, so when the 4th Crosswave failed, we contacted [REDACTED], since Bissell's two-year warranty had just expired the month before the 4th machine failed. We expected [REDACTED] to repair our Crosswave, however [REDACTED] replaced it with a different Crosswave (our FIFTH Crosswave machine, possibly "factory refurbished", but I'm not sure of that). This morning as I was using the latest Crosswave I thought I could smell smoke, but the machine was operating normally, so I continued to use it. A few minutes later the Crosswave blew out a large puff of smoke, so I immediately shut it off. As soon as I shut it off I could hear a crackling sound coming from the lower part of the machine- the housing for the spinning floor brush. I then immediately unplugged the machine! A few minutes later after the crackling noise had stopped I removed the clear brush cover to check the spinning floor brush. Not only was the floor br