Getting rid of a nasty smell in your house involves cleaning, deodorizing, and possibly identifying and eliminating the source of the odour. Start by cleaning all surfaces thoroughly, including floors, walls, and furniture. Use a mixture of vinegar and water, which is effective at neutralizing odours. Ensure that garbage is taken out regularly and that areas where moisture can accumulate, such as bathrooms and kitchens, are kept dry and clean to prevent mould growth. Air out your home by opening windows to allow fresh air to circulate. Place baking soda or activated charcoal bowls in various rooms, as these can absorb bad smells.
Additionally, essential oil diffusers or natural air fresheners like lemon or coffee beans can help mask lingering odours. Regularly wash fabrics such as curtains, upholstery, and bedding, as they can trap smells. If the smell persists, check for hidden sources such as mould behind walls or under carpets, or consult a professional for a thorough inspection and cleaning.