Well I was smoking my 510 and it got really hot. After that I had this really weird 'burned fish' taste. I was going to buy a new atomizer but I read somewhere to 'dry burn' the atomizer so I did it, but it didn't work. What I actually did was dry burn while dunking the atomizer in a cup of water, then shake out all the water, burn until coil is red and repeat several times.
After all that I did one last dry burn until the coil was red. I dripped some liquid into the atomizer and topped off a new cart and the bad taste is gone.
Looks like I won't have to get a new atomizer yet...