try the old fashion dish soap and water. I use the mpro-7 and it clean everything almost like brand new and it dont smell like hopps.
I never had that problems with ameriglo or any other sight. very strange issue, unless u are shooting a compensated.
G17, G19, G27, G22, G34, G35, G21, AR-15, AK-47, SKS, Mossberg, Benelli, Tec9, Mac10, Dan Wesson, Para Ordnance, Wilson Combat 1911, Kimber .45, S&W, Taurus, Hi-Point, HK, Springfield, CZ, .308 Sniper Rifle, .243 Deer Rifle, Kimber Rifle, Colt .22