I am not an expert on controller ports but if it is not letting you do certain tasks with your controller, it could be dirty. Try cleaning it with Alcohol and Q-tips/ paper towels. I would also recommend using a nylon brush (a toothbrush can work in a pinch if it is clean). Finally, when you finish scrubbing it down, use compressed air to blow any remaining debris out.
If cleaning it this way doesn’t work, then a deeper cleaning involving more tools such as picks from the cleaning section on ifixit may help. You can use those to force whatever is in there, out. But do this as a second last resort.
Worst case scenario, you’ll have to order a replacement part and sell the broken one online for parts. That way you can still decrease ewaste while fixing the issue.
Hope this helps!
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