Time to switch to a sealant...it does require a bit more upfront work - clay bar comes to mind - but once you apply it, it's supposed to last for up to 5 months!
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I have a clay bar already, it's been a couple years since I've used it though.
I think the wax lasts 3-4 months- I apply it when it gets obvious the water is no longer beading. If I'm brutally honest, car maintenance isn't something I like doing. I do it out of necessity, and I do it properly when I tackle the tasks. But spending an entire afternoon washing, clay bar, waxing my car isn't something I want to do.