Oh yeah, I found the vaseline post. It was someone else who already used the vaseline with it at night. I never thought vaseline moisturized my lips well so I thought maybe it could act more as sealant than moisturizer to keep acidophilus on lips.
I read the vaseline post again. The person did not get mushy lips so I guess the person had no problem with it. So, maybe you could use acidophilus at night if you use vaseline. I am just going by this person's good results with it.