Ask the Remodeler: How to spiff up hollow core doors Mark Philben -- Globe Correspondent May 12, 2021 1:18 pm Q. How do you clean hollow-core wooden doors? We have a 33-year-old Deck House, and all of the interior doors are hollow — either sliding, bifold, or standard. Most of them are showing years’ worth of dirt, especially around the handles. We’re thinking about downsizing, so we’d like to spiff them up. I tested a spot with Murphy’s Oil Soap, but it significantly lightened the color. If I continued cleaning with it, I’d have to sand down the doors and apply a finish or stain. In that case, I might as well skip the cleaning. That said, there is a group for Deck House Owners on Facebook, and some members cautioned against sanding the doors, warning that it can cut completely through the laminate. Maybe I should clean the doors and do a light sanding? What do you suggest?