Was out yesterday in a 110 mile ride. The helmet continues to impress. It was cold out yet I was sweating. Found that the best way to get the shield to lock for me is to use my free hand to push down on the top of the shelf while pushing on the lip with my other. All vents open and very little moisture build up except for me.I was able to reduce dripping icing somewhat in colder temps by closing the vents. Seems simple enough. Not sure why I hadn't tried earlier?
Rode in dang cold temps last week. I noticed that it felt like more air than normal was hitting my chin after one of the stops. Turns out the shield had not been locked down tight. I had ice starting to build up in a short time. The ice builds up right along the rubber seal where the shield sits when closed. It prevents the shield from locking closed after awhile. I was able to melt and slide the ice off the rubber seal without even removing the helmet. Extreme cases might need a warm up and melt.
So, to add a little user tip with the helmet. Make sure you hear or feel the "click" when closing the shield.