Ok thanks. I don't keep it full. I'll try that. I flux with wax every time I use it. I have a pair of heavy welding gloves that I wear and I use a SS kitchen spoon to stir. I'll try cleaning the spout and see if that helps. It's pouring a good stream so I don't think it's fouled but will check anyway.
Keeping bottom pour pots full or almost full makes a massive difference. Hope it helps you!