Expansion due to aging or became deformed, ask for replacement soon. ??? Do not touch the skin feels hot hottie in bed and release put a towel from the top of the cover, please adjust. -Please note allergic to metal is a metal spout, so. ??? As a hottie ??? put hot water as a hottie ??? ??? As the ice packs ??? pad ??? Put the smaller ice (crushed ice) as a stinging.