Which or that? Can someone explain?

[MrsFogi]

When should I use 'which' and when should I used 'that'? I fear that I overuse 'which'..........

Context please

It is more of a general thing. Whenever I write something I seem to have 'which' littered through the piece yet the spell checker always suggests 'that' or commas around the 'which' phrase.

Latest example I have "..a list of assets which are eligible...." or should it be 'that'?

that.

But I can't remember the rule. I just know that I've internalised it and always get it right.

"which" is for extra information? "That" is for a descriptor?

The table, which is over there, was the first table my mother ever bought.

The table that is wobbly needs to go to the shop to be fixed?

Yeah, blinglovin is right.

If you could remove the information, then it's 'which'. If the information is necessary, then it's that.

That defines, which informs. We've been through this before.

this is the house that Jack built, but this house, which John built, is falling down;
the Guardian, which I read every day, is the paper that I admire above all others

note that in such examples the sentence remains grammatical without "that", but not without "which"

Is that not backwards?
Would make sense if the 'which' phrase was removed fully, but not the phrase containing 'that' ??