How To Fix A Gameboy Color Gameshark Is There Any Way To Fix The Contacts On This GameBoy Cartridge?

Is there any way to fix the contacts on this GameBoy cartridge? - how to fix a gameboy color gameshark

It is a very old Game Boy Color Contact GameShark seems, they are worn out, but only if they touch the contacts inside the Game Boy, and no longer works. I washed with a damp cloth and some alcohol, and seems to work a little better, usually I get an error message immediately, but now it's a little bit. Can you contribute to the end of the tab a bit to access the contact surface in good condition? Has become a (well protected from me cut) without circuit coverage in good condition, except for contacts. I have not used them for about a year and a half, and when I came to work there, he had a lot of swinging and blowing.