Same here Penny, I've been doing this for about a month. I see results immediately, but as the day wears on they're back to the same black toenails.
Apple Cider Vinegar
I developed toe nail fungus, December of 2015. I went to the doctor, which was a waste of time. I've tried fungus ointments, etc., etc., etc. I ended up losing my whole nail. I started reading everything about ACV and hot water/cool water. Alternating the two. I started soaking my toe on June 23rd of this year (2017). I've also added Epsom salt and baking soda to the water. I've done this twice a day sometimes 3 times a day for 30 minutes, no less! After that, sometimes I'll make a paste of ACV and baking soda and leave that on for about 10 minutes. I also mix a combination of tea tree oil, Lavender and coconut oil and massage it into the nail bed and surrounding skin on my toe. In addition to all this, I have been drinking two tablespoons of ACV in two cups of cold filtered water twice/daily.
The 23rd of this month (July) will be one month!! I have been so diligent with this whole process. I have NOT missed one day. Trying to be positive because of all the excellent results I have read on this issue. But I have to say, I'm just getting so discouraged. I've lost my nail completely, I'm keeping it cleaned and making sure any discolored nail that starts to grow is cut. I don't know what else I can do. The doctor said it takes one year for a nail to grow. But I've also read reviews where the nail grew back in just a few months. I guess I'm just looking for some positive support from people who have been right where I am right now, or let me know if there is anything else I can do to help this process. I know everyone it's different for everyone and I just need to be patient. It's going on a month I've been at this. Is there anything else I should or can be doing??? Thank you for listening.