I've got a 2 year old HP P2015d laser printer. I love the duplexing. After 2 years the paper jams when attempting to duplex. One sided printing still works well. Here is a thread from ...

Glossy, bond, matte and other papers in your office's inkjet or laser printer are susceptible to static cling. Also known as static electricity, it causes paper inside your printer to stick together ...

There are few things as frustrating as a paper jam. Unfortunately, it’s all too common for paper jams to happen when you rush to print labels for express shipments or need hard copies for a meeting.