In all the times I have declared my over 3.4 oz. contact lens solution bottle, not once has it been further tested.

I also travel with a knifeless tiny swiss army penknife. To show you how long I have been doing that, I had even rounded the edges of the scissors when only blunt-tip scissors were allowed. I would say about a third of the time it is looked at. And I had a eerily similar experience where the "TSO who bag checked it scolded me that I'll have problems with it every time and I should present it specially and separately before the x-ray." Sometimes they may miss it and perhaps other times the x-ray operator realizes that either it doesn't have a knife on it, or the "weapon" is rather inconsequential, and lets it through.