velcro doesn't work, i tried that too, and it just kept coming off on one side, i tried gum too, which only worked about 10 minutes, i was about to tape it shut becasue nothing was working and everyone alwasy felt the need to remind me that my gas flap was open but the velcro doesn't work, the sticky glue on the back isn't strong enouhg and doesn't hold up to water or weather (hot or cold) well at all