Giving newborn salt

Hello everyone, my 11 week old daughter has just been diagnosed with c.f.. The doctors told us we need to start giving her 1/8th tsp of salt everyday. The problem is they told me to give it to her straight (wet my finger, dip it in salt then put it in her mouth a few times a day) and not to mix it with any water or my expressed breast milk. I guess they don't want her to associate feedings with a negative taste. I have been following their instructions so far but she absolutely hates it and screams when I give it to her, which usually makes her cough from being so upset. Anyways, I was just wondering if any other parents out there that have had a newborn with c.f. have any advice on possible other administration methods? Or just keep giving it to her straight and hope she gets used to it? Thanks in advance

Giving newborn salt