I dont know, Dan, jdro's screenshot of PAGES of private messages to you with no replies for the last months was pretty damning if you ask me. You may be a "nice guy" but you sure need some help with customer service. Every single complaint you nit pick and disavow one part of the complaint, thinking it fools us. Too many people have complained privately and publicly about your glass business here.
You should ship his tube back at your expense, since it was YOUR "mistake" that you never saw his private messages (even though he sent you TONS of them well before the Android app that "created" this problem (cough) for you was even released).