u/Pleasant_Mobile_1063

So i have had the thermal carafe for several years but it always has bothered me when i get coffee in the morning and then i put the cap on i will hear air escape as pressure builds and ill try and tighten it more and it will stop then start hissing again. My solution was to add another gasket in between the normal cap gasket and the cap, i used a round silicone gasket. No more hissing. The gasket that comes with the cap is too thin. In the photo my additional gasket is the one that looks grey

I was worried it would be too big for my hands but it fits and feels great