Enough said. Get an RGB scart or similar for your system.
Not let’s get to the main show! When I got the SNES the controller was a bit stiff when you pushed the D-pad down and on the A-button. This is why:I used many, many Q-tips and cleaned the sucker out of what I thought may have been Coca Cola or something akin to that (God I hope it wasn’t diarrhea) and dust, and then I washed the buttons and the rubber in detergent. For the contacts I used an eraser and then a slightly damp Q-tip.
And here is the beaute all cleaned up. And Super Mario World controlled perfectly after my little inspection. Awesome-SNES.