Science matters "The smell in the bathroom as a high school project. Prepared with the main aim is to devise a can of deodorant in the bathroom without the need to buy in order to save money. The en suite bathroom is a public school with many students, the smell in the bathroom, the organizer has the idea toinvent called. The smell in the bathroom Which is intended by the smell in the Bathroom was tested in the smell of the smell of freedom in the toilet in the bathroom, with places to explore in the bathroom of the school Nwmintrachotis testing. Bangkok's homes were made were made of lead began to make plywood boxes. Eye eye gel deodorant fan mounted behind the gel were put in a box. The results showed that the smell in the bathroom can smell it in the bathroom. The effective internal deodorant 70 in the process of technology The seven steps include defining the problem or the need, data collection, selection methods, design and execution, testing, revision and evaluation for the help. To project a pattern. The system is more clear