What’s the best way to tint windows with wooden frames?

Answer 1: Use the glue method. Run a small bead around the edges and tint it. Then push the glue out with a card and a towel. 

Answer 2: Use a cutting card instead of trying to cut freehand. 

Answer 3: Make sure you take extra care during the prep stage. Clean the window frame first, then use a scraper and use spray bottles to apply pressure around the edges. Next, clean the surfaces with paper towels and continue cleaning the rest of the windows. Wait half an hour for everything to dry, and then return to complete the install process.