You must use live coals when rekindling a fire.
Isaiah 6:5-7 NKJV
“So I said: “Woe is me, for I am undone! Because I am a man of unclean lips, And I dwell in the midst of a people of unclean lips; For my eyes have seen the King, The Lord of hosts.” Then one of the seraphim flew to me, having in his hand a live coal which he had taken with the tongs from the altar. And he touched my mouth with it, and said: “Behold, this has touched your lips; Your iniquity is taken away, And your sin purged.”
The coal from the altar symbolized purification (forgiveness) and the fire of the Holy Spirit. Like Isaiah, we must confess our uncleanness to God and allow Him to forgive us and to refill us with the fire of the Holy Spirit.
If you want to kindle a fading fire, you must bring the live coals close together. If you want to rekindle the flame in your life you must draw close to God.
James 4:8 NKJV
“Draw near to God and He will draw near to you. Cleanse your hands, you sinners; and purify your hearts, you double-minded.”