I needed to make another access for my Leopard Gecko's to reach the top level of their double decker tank - 'cause I split it down the middle and each side needs access. So, I used a parrot ladder and wrapped it solid with sisal rope and it rests at a nice angle from the bottom to the top level. It provides great traction for the gecko's. However, I had to remove it -- it SMELLED! The tank had already air dried from the paint, so when I added the ladder it was very obvious where the smell was coming from.... Is this stuff safe? Do I need to just let it air out (outside the tank) or do I need to find another type of rope to use?