Which ever option you choose, you tube some instructional videos on it. Some methods require the dead matter to be removed.
Don't worry, they are easy to get rid of. Plus 1 or 2 is not the end of the world, they won't over run your tank overnight.
Just handle them as they pop up. Don't get discouraged if 1 or 2 pop up after you remove the first, they do that sometimes. Just keep on them, will get them all.
My preferred method is Mrs wages pickling lime. Mix it with water into a loose toothpaste consistency, turn off all water flow, inject/cover (when they retract in the hole, I fill the hole). Use a piece of air tube to suck up any stray paste in the tank, it clumps and does not dissipate.
Probably a dozen or so methods to get rid of them, all of which work.