Many economically underdeveloped countries experience hygiene challenges in the health sector. This article focuses on elaborating a study on the air quality inside toilets and the development of a prototype able to detect the cleanliness level within it. The paper is based on the European Toilet4Me2 project, which aims to promote a solution for elderly or disabled people by implementing smart toilets in public or semi-public environments. The device presented in this paper uses high-precision IoT sensors that send real-time data via the MQTT protocol into a web platform. Warnings will be displayed within it if there is a technical problem or when the sensors detect an unpleasant smell in the toilet, indicating that it needs to be cleaned. After testing the prototype, the results obtained indicate an increase in the cleanliness level in the toilets by alerting the maintenance staff if the limits are exceeded so that they can act in time to resolve the situation. This prototype differentiates itself from existing implementations by providing a complete solution for a smart toilet that improves the user experience regardless of age or disability, representing a first step in solving hygiene problems in healthcare.