Unfortunately after a week of battling I've decided to return my spawn mouse too.
The sharp leading edges of the mouse feet are dragging all over my mouse pad (mainly when moving up or down) causing huge friction and making me lose speed/ control of the mouse.
I've tried a brand new Qck Heavy, goliathus speed and a boogie bug pad.
It's a real shame because the shape of the mouse is perfect for my hand, I feel a bit sad returning it - people will say I could buy after market feet but that's besides the point: I don't feel I should have to do that to get a brand new mouse working the way it should in the first place.
Also heard people talk about wearing the feet in but after 5/6 evening sessions of scraping my mouse around my pad I've lost the plot.
The spawn mouse is very sensitive for mouse pads, and it will work fine when used on a very clean surface.
Every little dirt on the mouse pad will make a scratching sound.
Unfortunately there is nothing we can do about the problem, only to keep the mouse pad as clean as possible.
Was CM supports response.
I'm sure others are having much better experiences with this mouse, I must have just been really unlucky
(UK user by the way)