On Tue, 13 Aug 2019 13:46:41 -0700 (PDT), Thomas wrote:

Recommend a staple gun, non air. I will rip this **** down and start over.Armstrong 12 x 12 fiber ceiling tiles. I have an Arrow from years ago but need clean.

Before you do that, think hard about replacing those tiles with 1/4" drywall. I pulled
down about a 16' x 4' piece of my basement tiles pulled for replumbing.
I notice nearly all of the 12" x 12" tiles have sagging. They all have bellies.
The entire 16' x 30' room. The tiles are probably 30-50 years old.
Pretty sure I'm going to drywall the entire room ceiling.