LEM,

Two ways to dispense starting fluid into your fuel: Just squirt it into the fuel or use the method mentioned above.

I've never heard of freezing it, but holding the can upside down and squirting will remove the propellant and pressure, just leave starting fluid. You can then open up the can and pour the contents into another container.

I would just squirt the fluid to replace evaporated ether. Dispensing into another container is probably best if you are mixing a batch of fuel from scratch.

I believe keeping the lid tight and storing fuel in a cool place will lessen or prevent ether evaporation.

I use commercially mixed fuels.

If you really want to understand diesel fuel, get a copy of "Dr. Diesel's Diary". Eric Clutton knows his stuff.

George