We do a lot of public hospitals and for budget purposes melamine is often specified. We also have issues with doors and slides popping out after a bit. 

Any suggestions as to how to prevent this? 

I would say a stronger hinge or slide but that won't stop the screw from stripping in the melamine board. 

We do frameless; would face frame be the answer? I don't like it as it seems unhygienic. 

Thanks for any suggestions. 

Ben