I've noticed a bit of harshness with new attys - but love the mounds of vapor.
Seems to be the PG they use to prime them.
You can try blowing that out and then refilling/flooding them with your favorite flavor and then blowing that out.
Or, you can try a quick bath in the Crest Pro Mouthwash (blue), rinse with warm water and let dry overnight - I use this for nightly cleanings anyway.
I usually just try and
vape thru it as it only last a few cart topoffs/refills for me.