I recently bought a cheapo disposable e-cig at a gas station so I could get a feel for vaping before throwing down $134 on a more permanent setup. For the first couple cigarettes worth, it was great. It wasn't flavored, mostly just tasted like PG but a little sweeter. The next day I started using it again, and it tasted pretty bad. The sweet PG taste was still there, but it was heavily masked by a harsh burny taste. This morning, it tasted even worse. Is this a common phenomenon, or is it just because I'm using a crappy device? What causes this? Is there any way to counter it?