Remove approximately1 quart of the hydraulic fluid & replace with an anti stiction oil, 15w motorcycle fork oil. All slides & jacks will have to be retracted before adding oil as to not overfill the reservoir, which should be within 1/4" to 1/2" from the fill hole when full. After replacing the quart of oil cycle the slides & jacks a few times, this will eventually eliminate most of the popping & creaking, extreme temperature changes will still cause it occasionally.
Danny & Linda
Former '13 FB owner