How to use minoxidil. My few concerns!

24 years male from Delhi asked Hair Treatment Dear Doctor, I have started using Hair4U minoxidil 5% topical solution for past 1 day on advice of my local doctor. Below are my few concerns regarding its usage. 1. For how much time I have to use the product. If a stop using this product what would happen. 2. Can I apply it once at Night only because my job schedule does not allow this do comfortably. 3. In future if I get results and stop using this product. Would it create a problem. Means do I have to use minoxidil indefinitely all my life after starting using minoxidil. 4. What If my hair gets dry during the treatment with minoxidil, in that case what should i use. 5. Can I use medicated soap or simply water while bathing daily after the application of minoxidil at Night. 6. On daily basis while bathing. How should i wash my hair treated with minoxidil. Please give me kind advice on my questions. Thanks.