I have been stuffing the 2 extra juice wells with cotton. And also the 2nd airflow hole. It doesn't leak at all, and with twisted 30 gage spaced coil, it is the best mtl vape I have had in 7 years of vaping. At 15 watts I'm getting big clouds for mtl. Using 70 30 vg pg. Just had to share this! Also works with cleito 120, better than the crap thing they give you to block the juice openings on 1 side. Flavor is way way better than the nautilus mini, even with the clapton in the mini. Just wanted to share for anyone into mtl. Vape for life...Live to vape