The retracting issue with your bedroom shade is typically caused by an imbalance in the spring tension inside the roller mechanism. To fix this, first remove the valance and detach the shade from its brackets to access the roller tube. Locate the tension adjustment controls on the ends of the tube—usually a knob or screw—and increase the tension gradually, testing the shade after each adjustment until it stays down as desired. Once adjusted, reinstall the shade and secure the valance. If tension adjustment doesn't resolve the problem, the internal spring may be faulty and require replacement. For replacement parts, contacting the shade manufacturer is recommended. Always keep shades rolled up during travel to prevent mechanism strain.