Tanks for all te replies.
ere is wat i ave done:
1. Tried te keyboard on a different pc.
2. Used compressed air.
3. Took te keyboard apart, seperated te plastic keys from te back, tried to clean it.
4. Pressed te silicon like keys temselves - it worked for te keys tat work, not so for letters between f and i for example.
I tink tere's sometin wron wit te keyboard. Te main reason I'm still opin it mit be sometin is tat all tese keys stopped workin simultaneously, at once.
I tink it's still under warranty, but I don't know if I can find te receipt. (te keyboard was around 30 bucks)
Any ideas? I'm not very opeful, but you just never know.
*Also emailed te company.
Tanks aain!