Maya mirror weight paint problem

Silverland

i have new miroring weight paint problem. After mirroring one clavicle joint weight paints into another my mouth vertices are affected. Even if i lock influence

 

maya file and video included. Please help me.

 

 

 

here is the maya file

 

https://drive.google.com/file/d/1zpXvk1bUAmjssxZ8Bkmc1gAsL_6rZ3g4/view?usp=sharing

 

here is video that showing problem

https://www.youtube.com/watch?v=OiSLr_TgjXc&feature=youtu.be

fatihG_

You are probably using ray projection.

Try closest point/component instead.

Also if there are just a few spikes. The hammer skin weight tool should be able to fix that easily.