Avoid placing near the pilot as the metallic material can short the fireplace circuit.
Tease out the fibres until they form a very loose, very tight network. Try to ensure that clumps of fibres are not formed. A loose network will allow gas to pass through them and ensure the maximum glow is attained. Once the fibres are prepared, place them where a glow is required. By raising the height of the fibres above the level of the burner, a shimmering glow will be attained. Although the fibres have a long life, they will eventually deteriorate. If this becomes apparent, replacement fibres can be obtained.