87 is a fine ambient temp, but those babies should be bumped to a 90F hotspot. or up to 94.

Have him contact the distributor, tell them EVERYTHING. Is he cleaning with any solvents. how long has he had them, have they ever fed yet? are they CH or CB? Theres a lot more questions that should be answered before he can be helped. Have you told him about the forum? He may be able to come here himself and describe the situation and get the help he needs here since he's the one that knows all the info.