When you buy cleaning products, choose ones that are non-toxic, biodegradable, phosphate-free, and chlorine-free.
Here are some eco-friendly cleaning advices from BHG.com:
Combine 1/2 cup lemon juice to 1 cup vegetable oil, olive oil, or mayonnaise. Apply to rag.
Make a paste of vinegar and salt and apply to built-up area.
Countertops, cupboards and walls
Dip a cloth in warm water, add dish soap and baking soda, (the baking soda serves as a soft abrasive to remove tough spots and light scratches).