If you need it, buy it unconditionally.
Sure, the suction is over.
It's a little less than it's expensive.
Worry good for home use
If there is a lot of bubbles to the surface of the water, it is less than half and the suction is blocked.
So it is often empty and you need to use
Water injection should be removed only with the use of spray, so before storage
It seems to be a price tag for home use.

Finished cleaning the bed cool

I'm still using it, but I'm just watching it, so I feel clean.