Hi all, new to the RV world but getting my feet wet, so to speak. Have a 2016 Orion, and loving it so far. My question is this...is it ok to put a little grease/vaseline/lubricant on the end of my black water tank pipe? Getting the clear plastic extension off is always a challenge. I would think it would be ok, but figured I'd ask the pros first. Any other suggestions are always welcome too. Thanks...