mom's knife is a knife a blind person can stab someone if there's someone there

and brimstone is shot from the mouth a blind person can puke
this goes for;
choco milk
ipecac
dr fetus
monstros lung
all of which are shot from the mouth

the techs are all controlled with obviously technology (of course)

epic fetus and ludo aren't controlled from the eyes but they are still connected almost like a neural link to control the tears and bombs

in which case this isn't what "breaks" the blindfold, this is just what the blindfold doesn't affect because it is only a blindfold for the EYES

but not to worry you do make an interesting point about all items needing to be stopped mouth attacks could be stopped by sewing the mouth shut and the tech or neural items (ludo, epic.f) could be stopped by having something to short the electrics like a nail electrified in the back of the skull

but that's just an idea in order to make the blindfold make sense for every attack possible