I've cleaned out any obstructions that I could find. The wand doesn't have a lot of suction.
The problem with mine (red version) seems to have to do with the part inside the lid behind the black plastic part that has a spring around it, and which I can see through the little vent on the top of the lid beneath the handle. I can see a flat black part inside the vent.
When attempting to use the wand, when the vacuum is first turned on, it sounds normal but in a couple seconds, it sounds like an air hiss at that vent. With a light, I can see that flat piece lower when the hiss starts. I'm not sure what's normal there.
Is this anything I can fix or hack? I have not tried to unscrew that part to take a look.