I fill mine with silicone oil laced propane, which is just green gas.
1. You should always be adding Silicone oil to your propane (An airsoft innovations Gas kit says 2 drops every 10 mags, its really easy.)
2. I store mine full, and I leave them inside at room temperature.
3. I never leave BBs in my mags between games, also if you use Bio BBs make sure you replace them with fresh BBs.
4. Stop wasting money on green gas, buy propane, add silicone oil, ??????, spend less.
Originally Posted by FirestormX
I know that isn't really what you asked, but it's the internet, and I like to type things that don't matter.