Have the same problem. Understand the button holding purpose but think that only works if everything about your slide is in perfect working order
My work around is to have my wife hold the retract while I lean on the area that doesn't go in. It helps. It works fine after that on partial slide extensions. As soon as I do a full extension I'm back out pushing. Just finished a 6 week 7500 mile trip. Learned alot about my 2017 KM24.
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