I discovered that mimics have a natural adhesive, but I have a lot of issues about how it actually works.
A mimic exudes a thick slime that acts as a powerful adhesive, holding fast any creatures or items that touch it. An adhesive-covered mimic automatically grapples any creature it hits with its slam attack. Opponents so grappled cannot get free while the mimic is alive without removing the adhesive first.[...] A mimic can dissolve its adhesive at will, and the substance breaks down 5 rounds after the creature dies.
What happens if the opponents try grapple checks to escape, do they fail automatically?
Is the mimic considered grappled?
Can the mimic keep on attacking other creatures with its slam attack?
How many creatures can the mimic grapple at once?
edit: what kind of action is "dissolving its adhesive"?