Above all, Gerard, I warn you use but little oil, and never boil it: boiling it melts that vegetable dross into its heart which it is our business to clear away; for impure oil is death to colour.

No; take your oil and pour it into a bottle with water.

In a day or two the water will turn muddy: that is muck from the oil.

Pour the dirty water carefully away and add fresh.
When that is poured away, you will fancy the oil is clear.

You're mistaken.