There’s something about the scent of bleach that’s scarily alluring as well as asphyxiating. No I don’t recommend dousing yourself in it though to escape senses of self-loathing, dread, inadequacy, or to kill any sort of filth you feel doesn’t belong inside you. Dahlia, however, is A) a cartoon character, and B) batshit insane. Even Killbaby can see that.
By the way, this video, in a similar setting, I think even more poignantly captures the emotion of what she is experiencing.