Spending too much time constantly sweeping and mopping? If you have the money to delegate those chores to a robot cleaner, you could save a lot of personal time. Thankfully, it’s cheaper than usual to buy a robot vacuum / mop hybrid during Amazon’s Prime Big Deal Days, and some of our favorite models are discounted. The deals aren’t just forAmazon Prime memberseither, with other retailers like Best Buy and manufacturers getting in on the action, as well.