We have had this same discussion for years and years and there are rules (which do need minor updating! - ie. we agreed to per-area storage):
It has always a problem, now that we have grown we need to be way more vigilant about enforcing them or we will drown in old projects. Techs work hard to keep areas up and running, they should not have to hassle people over and over to clear out old projects, members need to take responsibility for their stuff.
Techs - please feel free to actually bin stuff / repurpose / up for grabs that is more than 2 weeks out of date.
Thanks all!