It will be the old, stale doosil. Same happened with mine. I drained the tank and refilled. Old on the left, fresh on the right.

You want all your posts about milk-floats removing?

And? I gave a technical answer. Do you complain about @Hippoo's squirrel grooming thread in the tratterer section?

Are you Stanley Sir!'s twin brother? Did you have to wipe your fingers after they typed all that diarrhea?