The use of your light on your bowl may be an issue. Light generally causes algea to grow. This could make the bowl dirtier and need cleaned out more.
Don't put the 2 males too close together as they will want to fight! You can keep multiple female bettas together.
My father breed Bettas and they are really cool to watch having babies! However, he gave me 3 last year that were still young. We didn't know that he gave me 2 males and one female! It took about week before I found out