When heel slippage happens, most people intuitively tighten their shoe laces at the ankle, which won’t help with slippage. The laces which need to be laced the tightest are the furthest away from the ankle.
It’s a bit of a pain, but each and every time you lace your shoes, you’ll want to start at the toes and progressively cinch up until you reach the ankle.
When lacing shoes with heel slippage, 9 times out of 10, lacing correctly will ensure a snug fit. You will also want to relace your shoes, when wearing an orthotic for the first time.