How do you store your epoxy, with or without the red inserts?

If I store the epoxy between uses without the red inserts does it shortens its life as liquids?

I noticed some epoxy resin is starting to cure before use, just within 3 months – it create long pullouts and hard to flow through the nozzle.

I’de love to give up of replacing the red inserts, its making everything dirty and one of these days I’ll make the mistake and confuse them and that the end of the epoxy.

Thanks
Alex