The answer to 'house cleaning smells bad' is that there are several common causes, including mold, pet odors, old food smells, and poor ventilation. Symptoms include a persistent, unpleasant odor that doesn't go away even after cleaning. To solve the problem, you'll need to identify the root cause and take appropriate action.
If the smell is due to mold or mildew, you'll need to thoroughly clean and disinfect the affected areas. Pet odors may require deep cleaning of carpets, upholstery, and other surfaces. Old food smells can be addressed by thoroughly cleaning the kitchen, including appliances and hard-to-reach areas. Improving ventilation by opening windows or using fans can also help reduce lingering odors.