Razer naga side panel is not always responding

Hi!
I've been using this mouse for about 10 years, but over the past months the 5 and 1 button in the side panel do not respond well and sometimes require me to click them several times before they respond.

I opened it today to see if there could be any dust or grime under the buttons, but it was decently clean. I cleaned out some grime from the corner of the 12 button, saw if i could get anything lose with a fine vinyl paint brush and air dusted it without any results.

Is there anything else i can do to repair the panel or would i have to find a replacement part? I'm having a hard time finding replacements for it, so some sources would be appreciated! I live in Norway, but also have an address i can use in the US, though i won't see that person before december.

Thank you for reading and any answers!