I know sometimes that has happened to me in the past, dulling in denting. Especially during the winter months, I知 in Chicago. I知 a big fan of big humidifier. Lol. Did you seen both eye caps in the shed. I know sometimes it痴 hard to unroll the shed to check, sometimes I put a couple drops of water on the shed to help unroll it, like lightly moisting it. Hope I知 helping.