There have been several posts about venting problems. We have a new vent rod engineered and will send out replacements if you pm me your mailing addy.
Some people are reporting grease coming out the vent and that is perfectly normal. When we assemble the vent parts, we grease them so they seal first time. After a few uses it should clear out and then go away.
Please wait a day for a response. If myself or a tech doesn't get back to you, then post in the forum "Hey need some help" and we will get right to you. Sometimes I dont catch new posts because my wife logs in and that un-highlights the new posts. I am watching more carefully now.