I have a GBA SP I bought used for $20 and I am having issues with games freezing and not being recognized. These same games work perfectly well on GBA player and DS and DS lite so I feel the cartridges are clean and not the problem. It seems to difficult to get a q tip in there with some alcohol. I was also going to try some brasso and put it on the cart and do the insert remove insert remove cleaning method but I was a bit worried I might mess it up even worse. Anyone else have similar issues with their GBA that they were able to fix with some cleaning?