You mean - high priced fluid which is 100% more expensive for maybe 5% better performance... yeah thats a great idea.
Anyway for the original post, you have got air in your brakes somehow. Air bubbles are a pain in the ass to bleed out sometimes and sometimes you can make it worse if you stuff up something. You can spend a good amount of time getting the brakes back so if you cant be bothered take it to the nearest brake place and get them to use their pump. Costs an hours labour.