Well, that is a convenient spot for them to pick.
As has been said, they will lay eggs again. Probably the same spot, and probably on a regular basis. There are lots of tutorials out there on how to get these to hatch and then raise the fry. It is not simple, among other things requires culturing live rotifers, but lots of people do it.
My clowns started laying eggs earlier this year, and I have been getting ready to try to raise a clutch. If I succeed, I am not sure what I will do with the fish. And then there will be another clutch. And another. I can't possibly raise them all, so I have accepted that this is the way life works - the fry feed the tank when they hatch.
If you do decide to try it, as I said, they have made it easy for you. The best way to do this is to remove the eggs the day before they are set to hatch (they hatch like clockwork). In your case, remove heater, put in hatching container, and you are done. In my case, they chose a rock I can not remove, and I keep trying to put something in it's place, and they keep pushing it away. I will eventually work it out, but they are very determined fish!