i had same problem wat you need to do is take the eye cover off and give the eyes a good clean. Cus they do pick up paint easy if ur have chops.
When you take the eyes out tho be carefull and dont pull the eye ribbon cus it breaks easy (i know from first hand). Just use a small allan key and push them out from inside the breach. also clean the detents ets and put back together.
If that daint work pm me dude