Ive just seen this thread . I am /was a foot health prectitioner , i can offer a solution but it will take a year . T tree oil , start 3 times a week , for a week , then twice a week continuously, dont give up , the fungal infection needs to grow out but the t tree will stop the growth , it wont change the colour , keep toe nails short , keep at it , 1 year minimum as this is how long it takes the big nails to grow completely out. After 3 or 4 months youll notice a new white growth coming through, that is your new nails . Remember to keep doing it , if you stop the fungas wins . Yes it is infectious and you can pass it to your partner if you touch feet in bed . Good luck