Yes, to get the longevity and best results you need to remove the hybrid wax before applying the liquid wax.
The best and cheapest method to do this would be to use regular dish soap instead of your car wash soap (i like Dawn, but most others would work also).
1) Simply wash your entire vehicle with this water and dish soap mixture
2) When you're done, thoroughly dry your vehicle
3) Apply CarGuys Liquid Wax, wait 30 minutes and then buff product off
4) After buffing off, wait 6 hours for the product to fully harden and cure (the longer you let liquid wax cure, the deeper the shine will become)
5) Apply Hybrid Wax
The next time you wash your vehicle, use your regular car wash soap. And then only need to use the Hybrid Wax.