My bike uses Tektro Auriga M290 -brakes. They've been great, but few months ago I noticed that there was some air inside the system. I didn't do anything and continued to use my bike. Yesterday I find out that my brake lever had some brake fluid on it, so I think the lever might be leaking.
Is there any way I can fix this or do I have to buy new lever? Auriga M290 seems to be discontinued, so I can't get a new one easily. Could I use another Tektro lever, or even lever from another brand. Or do I have to buy new whole system?
I also don't know which lever/brake system to choose, because there are so many avaible. It would be great if you could recommend me some examples. My bike is a 28" hybrid bike, and I use it year-round, so the temperatures might be from -25C to 30C.
Thanks for helping!