David asks a good question. We'll probably need to know many more details to figure out the answer to this problem.
You/your friend may need to (and probably should have) contacted the manufacturers of each of these items for recommendations of products to use and to avoid in this setup.
A good answer is easier with a clear question giving the make and model of everything. "The biggest problem in communication is the illusion that it has taken place." -- G. “Bernie” Shaw