To "Shake Well"?

I just want to know if people should feel guilty for not shaking their bottles well before each use, or if it really doesn't matter.

Also if it is bad to once in a while forget to shake well before each use, can someone discuss the possible consequences?

I know stuff like Advanced Nutrients Nirvana is very prone to settling, but stuff like Bontanicare's Silica Blast has no effect whether you shake it or not. Homogeneous vs. Heterogeneous mixtures.

Thanks Auzzie07 for putting it that way. Totally enlightened my perspective.

Just brings back memories of chemistry. Fun days. Thank you for that too.