i would start with the rubber bushing. take a look at it. is it 'smooshed'? if so, that's probably the extent of your problem. replace it, tighten it up until you like the action, and you should be good.
but, living in the texas heat, which is similar to louisiana heat, another option is to remove the vent completely in the summer. i would take mine off around mar/apr and put them back on nov/dec. it isn't particularly difficult to do and gives you a lot more air flow.
I understand the concept of reality, but find it too confining for a way of life.
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.