Department store face mask - how to use?

[iamanintrovert]

I'm fairly new to face masks. I have bought one from Kmart (Australian dept store), in a sachet, but the instructions don't tell me how thick to put it on (ie should I use the whole sachet in one go? ) and how long until it should be repeated eg weekly.

So how thickly do others apply a clay-type face mask, and how frequently? PS it only cost the equivalent of 2 pounds, so more of a cheapie.

i use cheapie clay face mask sachets, only use about half a sachet and leaeon for about 15 mins then clean off
usually do them once a week

Thanks!