Espresso maker fault

[Narolines]

Hi
I have an espresso maker that works brillianttly most of the time, but occasionally in use the filter holder starts to turn slowly to the left until it gets spat out with a resulting mess. If I spot the handle starting to move I can hold it in place until the cup is full, then turn off and remove it normally, though if I do this it feels as though there is excess pressure in the system. Anyone any ideas?

Thanks in advance

[fruitloop21]

I think instant coffee sounds much easier ....lol!