Not drugstore, but Paul Mitchell The Detangler has the most slip I've ever found.
There are several ways/things to help+++
Kenra has some great ones. Clear Paste is a good one but it has high shine. Dunno if ++
Don't fall into the hype that washing every often is bad. It's fine. Some people will just have++
You don't need to "train" that's crap, excuse me :) I have enough hair for 4 people, I'm 70 >>
L'Oreal Ever Pure Silver Care s/c, Tresemme Effortless Waves s/c