I don't want to come off as an elitist but I think the jamaican blue Mountain coffee (grown on the east side of the blue mountains of jamaica) has much better scenery renewal properties. (just kidding, any coffee will do lol)
I think it could be vapers tongue, or it could be the juice itself, or it could be your clearo wick burning.
You'll have to use process of elimination I guess. Try the coffee. Then try switching clearos.
If those don't work, you know it's either your vapers tongue is very strong, or your juice is chemically.
You can wake up to new flavors. Maybe you just woke up to the chemically taste of your juice vendors stuff.
How do you get rid of chemically taste from juice? You steep it. Leave it in a warm place with the cap off.
The chemically taste is a result of the manufacturing/extraction processes of the flavor extracts.
You have to evaporate the naphtha or the alcohol or whatever was used to extract the flavors. Thats all.
I leave mine on the fireplace mantle. We have fires In-Leu of using the oil tank so that speeds it up.
You can also try giving the closed juice bottle a hot water bath each morning, which should speed the steep.
GOOD LUCK and enjoy your vaping journey. PS- Try buying pre-steeped juices or juices with better quality flavors.
Any chinese/foreign made juice is usually steeped on the trek from china to the US. I love dekang & hangsen.