My little collection in different light

Sorry, a little flash washed, but I was trying to capture how cloudy the Midnight is. What can I do about it? The Century is nearly 40 years old and clear as can be. The Midnight clears somewhat when it has been off for a while but clouds up when running. Is there anything I can do short of opening the bottle and filtering it? I've been cycling it for a while now and it isn't improving. Can I expect filtering to fix the problem permanently? It flows well, I just hate the cloudiness.