I'm ashamed to admit that I have an MDF kitchen, and recently the screws on the hinge of one of the doors have become looser and looser. I've regularly tightened them up but clearly the MDF has been gradually crumbling and just today the hinge has come out entirely. There's no use trying to screw them in again, since the holes have just become too large. I'd be very grateful for any suggestions as to how I could fix this. Should I use filler, or glue, or something else? I know MDF is unreliable but my landlord chose it, not me! And I don't want to ask him to fix it if it turns out to be a simple job I can do myself... Many thanks!