Bathroom Ventilator Does Not Block Lizards! Published December 11, 2018 at 1151 × 1535 in InsectOut Magnetic Insect Screen & Window Mesh ← Previous Next → Mr K installed the ventilator to keep fresh air flowing (it works!) but forgot that it does not block our lizards. To do that, he installed InsectOut Insect Screen – air flows freely, lizards stay out!