How to erase the stencil after finishing a tattoo?

It happened to me in my first tattoo. I've seen that everyone has the opposite of me, that the stencil is erased but mine stays until the end ;-; I have also seen that there are specific products to erase it (or do it with alcohol) but that's in case you made a mistake when you put it BEFORE tattooing I think I understand, also I don't trust to apply alcohol after finishing the tattoo because alcohol on open wounds.... well

Does anyone know why it doesn't erase or can you help me?

Pd: the photo is my first tattoo but you can see the stencil under it.