Supra Lockbox I've Forgotten My Code To A Supra Dial Lockbox (the One With The Alphabet Letters A-Z). Can It Be Reset?

I've forgotten my code to a Supra dial lockbox (the one with the alphabet letters A-Z). Can it be reset? - supra lockbox

It is a small hole at the bottom - is that the emergency repair? If so, how it can be used to clean or open the box?