The best early Prime Day robot vacuum deals I'd buy now, after testing dozens of them

With summer fast approaching, deals are heating up as much as the outside temperature. This year, Amazon Prime Day will take place earlier than usual, from June 23 through June 26, rather than in July. Since the event is right around the corner, many brands are already featuring some great deals leading up to Prime Day. As a robot vacuum reviewer who covers Prime Day deals each year, I've hand-selected the deals that are truly worth your time and money right now, and will continue to do so throughout the sales event. Having become quite familiar with robot vacuum prices over the years, I can attest that not…