To fix a printer that is producing wrinkled prints, here are the steps you should take:

1. Check the media – Verify that the media that you are using is not too heavy and that it is of the correct weight.
2. Check the rollers – Examine the printer rollers and verify whether they are clean and free from any debris.
3. Check the toner – Ensure that you are putting a fresh batch of toner in the printer.
4. Check the settings – Make sure that the printer settings are correctly configured for the media that you are using.
5. Check the guide – Make sure that the paper guide is properly aligned and adjusted with the media.