S SAM Brewer Member Joined Jul 24, 2021 Messages 8 Reaction score 1 Jul 24, 2021 #1 Hi. I have a bottle of Irish Moss that is about 10 years old. I want to use it but am afraid that it will wreck the brew. it doesn't smell any worse that it did 10 years ago. Does anyone know if kept properly, can I still use it?