The feasibility of at-home vertical blind repair depends on the problem. To repair a sticky vertical blind control, remove the cap that covers the control. Look for the star-shaped metal washer inside that attaches to the rod within the blind's pulley, and tap the control rod to loosen it.
To fix vane with a torn top edge hole, tape a large paper clip horizontally across the torn top edge. Use clear shipping tape on both sides of the vane to hold the clip in place and cover the entire hole. Use a hole punch to punch a hole into the tape that aligns with the original edge hole, then replace the vane. Alternatively, purchase a vane saver, which is a small metal or plastic piece used to replace the damaged hole, and install it.