We have a spring loaded door retainer to keep the door open on warm days. I think it is marketed as a Viva door retainer and is useless. Trouble is in anything more than the slightest breeze the springs are too weak and the door slams shut. No probs except when fly screen across the opening when there is a high probability of it being damaged as there is a bin on the inside of the door. Has anyone got a good method of keeping the door open which doesn't require something heavy being placed against it?