Feels like the draw is very tight.... how to fix it? Yesterday was fine, today is not as good.
Sounds like the coil is gunked up. Low draw plus poor vapor production?
Time for a rinse, at the least. plus probably a dry burn, with another rinse to rid the ashes.
Next time, do what many do. Get the 5 pack of replacement coils. When one gets gunked, put it aside. When you get a bunch of them, gang clean them.
You'll see. A fresh clean coil is vape nirvana...
And Spencer, Welcome!!
Although it is possible, this doesn't sound like a gunked coil issue. Spencer said it was fine yesterday, and noticed a big change with suction today. The build up on a coil is more of a gradual process. What he described sounds sudden, which leads me to believe this is an air flow issue. Which means he needs to follow the air inlets back into the bottom of the tank and make sure all is clear.
On that point, everyone would do well to clean the connector pin, regularly.Great point made here by brother GreenLeaf! Spencer, if you take the tank off the battery, is it still hard to draw air through?