Best position for valve with Slime inner tube?

[Fordulike]

I know that the Slime gunk inside the inner tube, is for want of a better description, like runny snot.
This means is can flow into the valve tube, if the wheel is in a certain position.
But what is the best position to have the valve, when inflating or checking the pressure?
I never had a problem with carrying out both these actions, until today.
The valve decided to spit this snot out into the pump connector and on my hand
I can't remember what resting position the valve was when parked up.
Maybe it wasn't in the correct position to allow the Slime to flow away from the valve.

Can anyone give me some tips, so I don't get covered in Kermit's s***k next time

 

[piotrmacheta]

This has come up before in the forum and I said I always put the valve at the 12:00 position and it seems to work for me but someone said that 9:00 or 3:00 was better.