Dreame Multi-surface Cleaning Solution (1L) for all Robot Vacuums

Good solution. Makes our hardwood floors shine.

For your X40, Like another has said a little goes a long way. It does a nice job cleaning our ceramic tile floor. We have 2 large dogs and you would not know it.

One dose of this cleaner lasts for many many cleanings! And it works very very well!

The cleaning solution is usually out of stock, but I was able to snag two bottles. It works well, but you still have to mop to make sure your floors are clean. Double the work? Maybe, but you won't mind if you like clean floors. The cleaning solution does work well though.