Yours went faster than normal. Sometimes ants get to them. I haven't needed to replace mine, but if I did, I would switch to the narrower hose. This one:
https://www.amazon.com/Thetford-7042...s%2C755&sr=8-1
It takes a little work and creativity to get it installed on the larger opening, but many owners have done it. If you want to get help from those who have done it, join the Roadtrek Zion and Simplicity Owners page over on Facebook. If replaced with this smaller hose, it is no more fighting with it to get it back in the little box... and some also put in a back-up gravity hose in the same compartment.