How do I clean a picture printed on Baryta Prestige Paper?

Hi everyone!

I have this beautiful picture printed on Baryta Prestige canson paper and glued on aluminum that has some sort of dried sticky residue on it. It's not sticky now, and I was wondering how I could clean it.

Do you think water is enough or it will melt the ink used to print the product? I don't have details on the ink used...

Any suggestions is good to me!

thank you for your help!