I also have that problem, and am glad to see I'm not alone.  I haven't
tested as many as you did, but it was because I figured that none of
these "multi-purpose" (or, in my case, NO purpose) solutions were for
me.

I recently posted about the recent apparent drop of Aosept from the
market (along with generic pork-based enzymatic tablets).  My eye doc
says it's market forces (too many contact wearers too lazy to clean
their lenses, so everything's disposable, so people don't need the
thorough cleanings we're used to).  Unfortunately, that seems to leave
people like you and me screwed, as we can't use those solutions, for
some reason.

I have the added problem of preferring to pay $60 a year for my lenses,
rather than the $250 the disposables would cost me.

If anyone with this problem HAS found a multi-purposes that doesn't
"goop up" your eyes, please let us know!

I have used AOSept for decades.  The stuff works, but I do consider it
expensive and a pain in the a.s to use as part of a multi-step contact
lens maintenance regimen.

Recently, AOSept has been impossible to obtain, forcing me to "test"
other methods.  I figured it was time to give multipurpose solutions a
try.

I tried Aquify, ReNu, Opti-Free, and Complete Moisture Plus.  I found
none of them allowed me to wear my contacts comfortably through an
entire day of activity.  I have no clue why.

I tried "Clear Care" two years ago, but had similar results to the
multipurpose solutions I recently tested.

I find with the multipurpose solutions, by the end of the day my vision
becomes very blurry.  I believe this is due to build-up on the lenses,
because when I put my glasses back on I am fine.   Sometimes this 'end
of the day' buildup makes my lenses downright uncomfortable. After
soaking the lenses overnight, they are pretty much back to 'normal' the
next day.

I found the Aquify product was the most comfortable, followed by the
Complete.  But I had to remove my contacts a good 4 hours earlier with
all of them than my experience with AOSept due to deteriorating vision
quality.  I also notice when I wake up in the morning I have a
significant amount of 'debris' or 'yellowish sleep eye deposits' on my
lashes that do not exist when I use AOSept.

I tried to follow the directions as indicated for each product.  I
added an additional cleaning step using MiraFlow or equivalent, and an
extra rinse with saline before inserting.  I get the same result every
time.  Towards the end of the day my contacts are very blurry.

Am I doing something wrong?  With the popularity of multipurpose
solutions, is anyone else having this problem?  Is there some secret
trick or other product that might help, or should I just go back to the
hassle of AOSept now that it is appearing back on the shelves?

TIA