Frequent drain blockages can usually be avoided. Flushing large objects can cause stubborn indoor problems, so throw hard-to-flush items like paper towels and sanitary products in the dustbin. Hair is another frequent offender, but it’s a little more difficult to manage. Installing a mesh screen over your drains can help, as can brushing before every shower. Use a baking-soda-and-vinegar rinse once a week.
Oils and grease are also notorious for their blocking powers. They harden when cooled, so it’s best to pour them into a container for trash disposal.