Why does my friend smelled so bad? 10 points?

shes 19 and we're best friends i stay over her house sometimes for weeks. she takes a shower everyday but she still smells. shes has the best soaps and everything and she takes showers at school. she doesnt realize she stinks and i dont want to tell her. i remember we were washing her clothes and they still stunk after she washed them. she wear alot of deodorant. i just dont understand. she smells musty all the time and she smells up her room. im not being mean i just dont know if i should tell her.