They must go in the general waste bin.
still believe this stuff works..Consider return policies.

Retailers have the legal right under the Distance Selling Regulations to examine returns and deduct an appropriate amount from any refund for any loss of value.If it has been unboxed, scratched, used or damaged in transit, for example, it has lost value.In any event, that machine isn’t new any more and must be resold for much less.

If you change your mind, that loss of value, and the cost of the return, will more than likely be passed on to you with an independent retailer..If you are undecided as to whether a Sebo is for you, want to buy online but still want to try before you commit, or think it likely that you may want to return the machine if you don’t like it, then a seller like John Lewis or Amazon is better for you.

This is because of their generous return policies, lack of scrutiny on those returns and often even free prepaid return carriage.
One reason you pay more at large retailers is every customer must absorb part of the cost of the few who change their mind..And who is paying for travel time from place to place?
Our workshop has thousands of spare parts and many specialist repair tools.You simply can’t do that out of a van.
Also, a man in your home with your machine in bits all over the floor makes you a captive.He can tell you it’s a £150 repair (when it just isn’t) and you’re on the spot to make a decision.. >>Here’s a topic on our advice forums outlining some of the “in the home” scams out there<<.
(Editor: Quick Air Fryers)