How many coats of NXT did you use? You really have to baby it to keep it.. ie, dust it almost daily. Rain also sucks hard. I use the klasse system and love it. Unfortunately, there's no way to buy the quick detailer (sonus) in bulk 🙁 Really could use it... gotta look into alternative quick detailers made for synthetic waxes.
and my car owns me 😛 wash it weekly/bi-weekly... twice a year it gets a 5 coat base of klasse, then every say 5-6 weeks another coat for kicks