I've seen two game-changing stair-climbing robot vacs in action – there's one clear winner in the race to the top

• Eufy and Dreame have both announced stair-climbing robot vacuums at IFA
• The Eufy MarsWalker and Dreame Cyber X both use independent arms and roller tracks to scale steps
• Eufy's will go on sale 'next year', but Dreame's is at concept stage

You wait years for a robot vacuum that can climb stairs, and then two come along at once. There are plenty of cool new robovacs making their debut at IFA, but none quite so exciting as the Dreame Cyber X and Eufy MarsWalker.

One of the biggest problems with robot vacuums is their inability to move unassisted between floors. Even today's best robot vacuums are only able to clean one story of your home at once – which puts a significant cap on how truly autonomous it can be. Of course, you can carry your bot between floors, but once it's done you ...