Best Answer: There are still many different ways that you can actually fix your credit score when you have a bad co signer. You just need to make sure that you work on building your own credit back up without relying on your co-signer. There are many things that you can do to make sure that you fix your credit score. You just have to make sure that everything is getting paid, at the best times possible. You should never make any late payments or miss any payments. This will only effect your score. Instead, you can try making payments before your due date, and you can also try paying more than the minimum that is due also. This will all have a positive effect on your credit score. Your co -signer shouldn’t be depended on unless you really need them for any typical reasons. Even if things still seem impossible, you will still be able to fix your credit score no matter what things seem like in the end. There are still many options that you can balance out when it comes to fixing your credit score. It may not happen over night, but it will with time. You just have to stay on top of things.