iPhone 13 pro battery replacement

I bought the anti-clamp and iphone 13 pro fix it kit to replace my battery on my iphone 13 pro.

I cannot get an initial gap to appear at the bottom of the display after following these directions:

iPhone 13 Pro Battery Replacement

After removing the pentalope screws at the bottom of the iPhone, I tried the following process for 2 hours:

Heat the bottom of the iPhone with a hair dryer for 90 seconds, quarter turn the anti-clamp to increase the suction each time, wait for a minute to see if a gap appears but it never did.

There must be a step that isn’t in the instructions.

Specifically, what to do when the following step does not result in an opening gap at the bottom of the display other than try again:

“Wait one minute to give the adhesive a chance to release and present an opening gap.”

I am trying this repair myself because the apple store refused to replace my battery as the top right corner (metal part not the screen) has a few more scratches than they are comfortable with.