ucfdiver
Contributor
Pulling up on the dump valve cord works just fine. I've done this in tropics and in cold water wearing dry gloves and never had the issue you're describing.don't do that. Only way to control the dump is to pinch the line right at the dump valve and pull the string while pushing against the dump itself. If you do it any other way you run the risk of having the line pop out of your fingers, and/or are pulling the wing all over the place. If you have the shoulder flexibility to pull up and out, then I guess that works, but the best way is to pinch at the dump and vent that way. Most controlled way of venting the wing.
I can't for the life of me figure out what you mean by "pulling the wing all over the place". A properly sized wing only has an inch or two to travel, and even if you do move it, it pops right back into place.