or you work here? >> oh, no. because this morning -- so sorry. i don't speak english too much. so sorry. so sorry. >> that's okay. you don't have to be sorry. you just have to do the right thing. the way that girl was sitting down there begging us not to give her a citation, i have to. you know? that's my job. >> that's a problem when you want to close out the light and everything. they don't check this. >> for now, inspector walsh will carry on, shining a light into some of the city's darkest corners. >> a bunch of mold and mildew over here. >> keeping san francisco clean is a job he takes seriously. >> do you see all that? clean all that. >> the task now grows tougher with every passing day. >> just a rereminder, when you o