ive washed them 3 times and they still smell... anyone got any tips?

Do them in a biowash if you dont already

and see here viewtopic.php?f=3&t=87719&hilit=smelly+nappies

Strip your washing machine and then strip the nappies. Do a hot wash program with an empty machine, and adding a cupfull of vinegar. Then wash your nappies with 1/4 cupfull of vinegar, and that should remove any powder build up, which is probably what's causing the smell. Dry them outside i the sunshine as well. That will help!.

Would say the same as above, but also keep putting them on a rinse cycle after washing with vinegar, until you can't see any bubbles in the machine during the rinse cycle.