When you end your last row, there are occasions where you can't use a pull bar. The alternative to using a pull bar is to modify the groove side of the plank that's on the floor. Shave the groove and remove the debris, making sure that there's none in the track. Next, take a small bead of glue and run it down the groove side of your plank. Engage the next plank as close as you can get. Set the plank in place with the pull bar. Finally, tape the plank to its neighbor to secure it until the glue sets.