This 100%. I only figured this out 15 years after having started driving.

To add to this I tilt my rear view mirror (the one connected to the windshield) a little bit upwards to force me to sit a bit straighter and taller when I look at it. You slouch less so for long car trips your back ends up feeling a bit better.

Mr. Clean Magic Erasers.

The “generic” name is melamine sponge. These work exactly the same and cost a fraction of the brand name.

Technically no. The tolerances should be more or less the same (generally 90%-110% label claim for the active ingredient) . Manufacturers aim for 100% and generally hit that target (or get very close to it).

The bioavailability could be different though - if you are doing a bioequivalence trial for generic VS brand, the generic would have to be between 80% - 120%. This difference is generally a result of the starches, fillers, and other stuff that may be in a generic formulation.

Same net effect as your comment (wider tolerances), but there is a bit more nuance.