To all inquiring about the best way to clean this area, the q-tip route is a good way to go, particularly if you are diligent in cleaning your vape. However, I know (I see some of the RMA's ) that not everyone is.
The entire vaporpath is sealed from electronics, so you can literally remove the flavor chamber. Plug the bowl area with 1 finger, spray some ISO into the flavor chamber area, plug that with your other finger and shake. It will release any build up on there. I do caution people to not do this as their normal cleaning routine as it will eventually degrade the silicone seals- but it's good for a monthly deep clean.
PS- why we didn't think of this sooner....I have no idea. I saw my tech doing this and was mind blown.
Mine never got that dirty, but thats really cool to know, Davinci should put up a detailed video on the proper way of doing this.