Step 6: trim the stencil to fit the screen
With the screen tightly stretched, make sure there isn't a bunch of dirt or grit on the screen, that will keep you from getting a clean attachment. Make sure the stencil isn't too wide for the frame. If it is, you will want to trim it down. You can save the pieces you trim off to use as masking to cover the parts of the screen that you don't want to print.