Well, except for a couple of oils that don't require bile for digestion, many of the good fats need bile and lipase to be broken down like the other fats. If for some reason, you are not producing enough bile, or you aren't able to release the bile efficiently, your fat metabolism will suffer. Nutrition is the key here. If you flush, but you are still missing key nutrients to develop bile, like sulfur and taurine, then your pathways will clear, but your production ability will not change much. Likewise, if you improve your nutrition, but your pathways remain blocked, your fat digestion will still suffer.
Also, lipase deficiency can result from under production(usually nutrition-based) of the lipase enzyme or from overconsumption of foods that require lipase. Many people suffer when they try to compensate(subconsciously) for their inability to metabolize fat for energy by eating too many carbohydrates. This can further impair the lipase production. The pancreas produces both lipase and insulin, and can only do so much at one time. If lipase production is low, eating foods high in lipase could be helpful. I'm attaching an article that I found beneficial.