What what a salamander have the greatest difficulty clinging to if a salamander relies on hydrogen bonding to stick to various surfaces?

A salamander would have the greatest difficulty clinging to surfaces that are nonpolar and lack hydrogen bond donors or acceptors, such as Teflon or smooth glass. These surfaces do not provide the necessary interactions for hydrogen bonding, which is crucial for the salamander's ability to adhere. Additionally, highly hydrophobic surfaces would further inhibit the salamander's clinging ability due to the lack of attraction.