interest rate

Hello, I have a private student loan from SoFi with an interest rate a little over 6%. Any recommendations on how I can lower the rate?

I'm no mortgage expert but I think I understand APR vs interest rate when getting a loan, (i.e. APR is your effective interest rate after they roll their fees into the loan, so basically it's your effective interest rate) and this one has me stumped. So I got a call from my current mortgage...