The best way to remove the screen is to push it down into the shallow valley all the way around where the heater holes are, a small socket will do the job, after this the circumference is less and it comes out easily. Just soak it then tap flat with a hammer if you want to reuse it.
The main problem with bad taste seems to be the build-up in the mesh crevice/slot, get that clean with a seal pick or something before the iso would be my advice.
The main problem with bad taste seems to be the build-up in the mesh crevice/slot, get that clean with a seal pick or something before the iso would be my advice.