Dear Liz: My wife and I co-signed on our daughter’s mortgage, then the home went into foreclosure. My wife and I have no debt and a net worth that exceeds $1 million. We purchased our cars with cash and the single credit card we have with a $35,000 limit is paid off in full each month. Since the foreclosure, our FICO score has been in the “fair” range. We have no plans to take out a loan for anything and plan to continue our “cash and carry” lifestyle. However, the low FICO is a little disconcerting. It appears the only cure is time (measured in years). We welcome any additional guidance.

Answer: You can’t fix your wounded FICO scores overnight, but you could speed up your credit score rehabilitation by adding one or two more credit accounts to your mix. At least one of those accounts should be an installment loan, since scoring formulas want evidence you can handle different types of credit. If you don’t want an auto or personal loan, then consider a “credit builder” loan that puts your payments into a certificate of deposit that you claim when all the payments have been made. Credit builder loans are offered by credit unions and some online lenders.

Is it worth the effort, even though you don’t plan to borrow? In most states (although not California), credit scores heavily influence what you pay for auto and homeowners’ insurance. People who don’t have the best scores can pay hundreds of dollars more each year for coverage. Credit scores also may be used to determine deposits for utilities and wireless service. If you need to rent an apartment, your credit scores matter as well.

If none of those are a concern, you can continue to take the slow road to rebuilding your credit, since the foreclosure will fall off your credit reports after seven years. If you want to speed things along, though, another credit account or two should help.