Every time I vape my DIY Coughdrop juice. I wake up in the morning and cough up some of my 25 years of smoking tar. I think it's the Eucalyptus oil. For thousands of years, people have used this for medicinal purposes. I also added lots of menthol. Black Cherry and Strawberry. Tastes like Halls Mentholyptus. I will continue to vape this every night, and maybe my lungs will be pink again...