The Stag is the guardian of the realm of nature in ancient Druidic and Celtic traditions. Here he is purifying himself in the waterfall of universal divine light for it to flow through him and all nature so that it can be anchored and grounded to the earth for all life to benefit. The Stag is a powerful spirit animal. Those who have him as a spirit guide are equally bringing in light and holding it for life on earth.
Use duster and or vacuum gently with appropriate fitting.