I would leave it alone. If you want to add something more long-lasting you're going to have to remove what you applied.
I've gotten 2 months of water sheeting out of DGPS. I recently got 3 months with Reload. Not saying one is better than the other, just sharing my results. I have to wonder if adding a topper to DGPS helps or hurts the longevity.
If you want to re-apply something I would go with a product that will last longer. I recently got 6 months from 303 Graphene and Jescar Bead-it. Keep in mind you'll need a relatively warm, dry place to let them cure.