stuck in second prison part

[dufake]

hi

i got stuck in the second part of the prison (i am fallen down into it, after I pull off the bed) now i ve found a glass and filled the acid (which i've found in the kitchen) in it. but i don't know, how to gett off and break the lock(s). i've found three locks in this part of the game. also two doors, which won't open.... combine from the found objects (hammer, nail,etc...) doesn't work....

i hope you can help me....sorry for my bad english, i am from germany!

thanks in advance!

greetz

I.The Tool
You have to combine the hammer and something I forget.(Found it in a jail.)

II.Acid
Use your acid on the "weak" lock.(It had its description.)

III.
Use the tool to crack the lock.