Shelter insurance provides the cheapest auto insurance for me. So you might contact shelter insurance for an auto insurance quote to see if they're any cheaper for auto insurance than your current auto insurance company.
Your insurance rates will depend on your age, driving record and age and value of your vehicle as well as how many miles you drive your vehicle per year and whether you use your vehicle for personal use or business use and whether you've had any at fault auto accidents.
Shop around online and get some free online quotes from those auto insurance companies to see what they might cost you per month or per year for auto insurance.