They claimed that the Chargers were using stickum when they were actually using a certain brand of towel that every team in the league had.

They claimed that the Chargers were using this "stickum" to get a better grip on the ball, when in reality, those towels were only used to dry the ball, the players' gloves and their arms.

They made it sound like the Chargers cheated their way to a 24-0 lead when they did nothing of the sort.

The Broncos didn't claim anything. The line judge noticed something fishy and asked to see the towels. The Charger's equipment guy tried to hide the towels, and thus the investigation/fine occurred.

Also, can you provide a link to show that the Broncos used the same towels?