What do you do when you develop resistance to Botox?

I occasionally get wrinkle Botox.

It seems that sometimes, depending on the area, there are parts that develop resistance.

It seems that even after getting Botox, the effect appears less significant than before, or there are cases where there is no effect at all.

In cases where there is resistance to Botox like this

What is the usual best way to do this?

Will it be effective if I rest for a while... before getting it?