Probably time to investigate the Tabata protocol for body fat loss. It is also muscle sparing. That's 20 seconds max effort followed by a 10 second pause (one cycle) and than repeat again. Usually from 4 to 9 cycles, 3 to 4 times weekly. Usually takes around 3-4 minutes a session to complete a personal cycle goal. This is a form of interval training (many different forms of this) which boost the VO2max capacity along with inducing a high anaerobic state. One of the most effective ways to burn fat in the shortest period of time. If you do not have the time or desire for those 30 to 45 minute daily cardo workouts than the Tabata method could fill your needs.
Can do this on a stationary bike (in any form), sprints, rope jumping, punching a heavy bag (not you wife), rowing machine, etc. Have used this method on squats and DL/SLDL's, in the past, with very good results. As with any cardio program, the body will tend to burn fat even on resting days. You will be in that state of fat burning once the body is operating on a higher level of fitness.
Feel free do to a search of Tabata and other interval training styles for max fat burning. BB'ers work too hard to build quality muscle to have it reduced or lost by endless endurance style cardio sessions. Where the body almost feeds on it's self. Good Luck.