Barking Before Gloves

I am getting tons of barking at the start of the Utility Directed Retrieve (aka Gloves) exercise. I can't quite figure out why. I have a feeling this will not be a problem in trials but I would still like to work on it. My guess is that the gloves are his favorite article to to retrieve due to the fact that they can be a moving white object (I frequently throw them low on the mats to get him pumped up.) Anyway, I think the frustration of having to sit twice before the retreive may be frustrating for Wyatt. Not sure how to work on this yet. I tried waiting until he stops to start and using his oops word but that did not seem to do much, at least in the short run. Any ideas appreciated!