Being a good example of Islam

My question is, what does a person need to do to fix the wrong of making other people have a wrong and bad impression of Islam? I was put in charge of making sure a bathroom was clean in a office building where a madrasah is. The kids messed the sink up by making mess with water and leaving garbage on the floor. I did no do my job properly do to forgetfulness but I have psychosis split personality disorder and OCD. It is still totally my fault and the people think because we are Muslims we are bad people. What do I have to do to resolve this wrong with Allah Ta'ala?