This window-cleaning robot I tried is surprisingly impressive (and $100 off)

The Ecovacs Winbot W2 Omni Pro window cleaning robot is on sale for $500, a $100 discount, on Amazon.

I've just finished testing a device that makes me feel like I've stepped into a time machine from the future. The Winbot W2 Omni is a window-cleaning robot with a portable station that cleans windows inside and out.

Also: Finally, an outdoor security camera with useful features and no monthly subscription fees

Ecovacs has been making window-cleaning robots since 2011, but this is the first time that I've tested one -- and I'm glad I did. Sometime during those 13 years, Ecovacs perfected the art of window cleaning; I call it an art because the Winbot W2 Omni turns the chore into a form of entertainment for the owner.

The Winbot's setup is pretty easy. The robot comes with a lightweight station where you keep everything: the ...