The answer to 'my maid service is filthy' is that there are several common causes, including poor training, lack of oversight, using improper cleaning methods or products, and insufficient time allocated for the job. Symptoms may include visible dirt, dust, or grime, unpleasant odors, and a generally unkempt appearance. To address this, you should first try communicating with the maid service to understand the issues and give them a chance to correct the problems. If that doesn't work, you may need to consider finding a new, more reliable service provider.
When dealing with a consistently poor maid service, it's generally best to avoid attempting DIY cleaning and instead call in a professional cleaning company. They will have the right equipment, products, and expertise to get your home sparkling clean. Trying to fix the issues yourself could end up causing more harm than good.