Since the first time I tried a Foreo Luna Mini 2 [1] (£120), I've been unable to part with the silicone-nubbed face-cleansing tool. I use it every time I wash my face and even have the Foreo Luna Play [2] (£30), a smaller version of the device with preloaded uses to travel with. The only problem I had with the tiny tool was figuring out what to do with it once it ran out of uses.

During an event I attended a few weeks ago, a presenter offered up a solution to this problem that blew me away: instead of tossing your Luna Play when it runs out of uses, you can use the device as a tool to clean your makeup brushes. The texture of the silicone bristles provides enough friction for the stubborn makeup in your brushes to be released from your tools with a little soap, even without the sonic pulses the Foreo usually provides. A nonwasteful second life for a beloved beauty tool? I'm sold.