Samsung is very confident about its latest generation of vacuum cleaners. The South Korean brand is offering a “100-day promise” on all its cordless and robot vacuum cleaners, which lets you return the product for a full refund if you’re not satisfied with its performance in the first 100 days. See all Samsung Jet vacuum cleaners eligible for 100-day money-back schemeIn comparison, best-selling vacuum cleaner brand Dyson offers a 35-day returns policy, which lets you change your mind on any of its products (vacuums, hair care, purifiers, fans, and heaters) anytime within the first 35 days afte…