Your curtain includes additional velcro tape to secure to the window frame between the suction cups. This blocks out light completely for the darkest of rooms! Ensure the velcro tape piece used is the opposite type to the velcro on the curtain.
1. Remove the protective layer on the tape and carefully stick it to the window frame so that it lines up with the velcro on the curtain.
2. Attach the curtain to the surface using the suction cups, making sure that the velcro patches line up with those on the wall.
3. Carefully smooth the velcro on the curtain to the velcro on the wall.