Hi Tom,
Thanks for reaching out about your iFixit fix kit!
If the problem is just that the phillips kit driver isn't magnetized to hold the screws, you could re-magnetize it easily enough yourself by rubbing a magnet on it.
If, however, the head of the kit driver is not holding its shape well, we'd be happy to send a replacement kit driver out to you.
If it is the latter scenario, please contact us through help.iFixit.com with your order number and a request for a new kit driver and our customer service team will get you taken care of.