Lube the rails with "Rail Snot" or similar type of liquid rail lube, and bow string wax on the string.
The rails get smoked by the speed of the string moving down it, and the string is equally heated up. The "snot" will help lube the contact points and prolong the string life.
You'll smell the string burn - if you are low on lube.
Wax the string and cable where they rub, cross, or bump. Work the wax into the fibers by rubbing it, and do it often.
Your crossbow will need to be shot - how long it will last is dependent on the wax and lube, and keeping it within the performance limits - AKA - using the 20 inch bolt length.
I've had crossbows that needed new cables and strings after 50 shots, and I've had some go several seasons within a hicc-up.
Usually - I shoot 150-250 bolts a season before the opener, and a few during the season, if nothing has happened in the stand.
I've switched to an Excalibur Micro, but I wouldn't be worried starting with your model - they are good xbows, and I'd expect it to last several seasons with proper care.
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