Bonding protocol for fillings and cores

Sounds like a noob question but it’s sometimes good to review some basics to stay sharp maybe find some better methods. What’s everyone’s process?

I’m pretty basic, phosphoric acid etch on enamel only 15 seconds, air dry lightly, scrub in 7th generation bond for 20 seconds, let sit for 10 followed by 5 seconds steady air dry. For cores I’ll etch everything and scrub 2% chlorhexidine into the prep for 15 seconds before applying the bond.

I have noticed a big difference in retention after using the chlorhexidine scrub and being mindful of how much I’m drying the dentin.