So, I have made many liqueurs in my day, and have decided to give away different flavored liqueurs to everyone on my family. I made a standard limoncello which turned out fabulously, and is something I can be proud of. However, I made a pomlimoncello (with grapefruit rind instead of lemon and tarragon). I thought I was careful enough with both to not have any pith but apparently not because the pomlimoncello is bitter. Does anyone have any tips to removing bitterness? Starting over isn't an option and I'd prefer not to add any more simple syrup as I'm not sure how much it would help.