Why clips make takedown clean
The close-up above shows a C9 bulb held in a gutter clip. Because the clip grips the lip of the gutter rather than being fastened into it, it slides off with the strand at takedown and leaves nothing behind. Shingle clips work the same way on edges without gutters. That is the reason we never staple, nail, or screw seasonal lights to a house: whatever goes up in November should come off in January without a trace.
On older roofs in Ansley Park and Druid Hills, where shingles or slate can be brittle, careful removal matters as much as careful installation.
In practice that means working the roofline from the ladder in the same order it went up, releasing each clip by hand instead of pulling the strand, and checking the gutter lip and shingle edges as we go. Cold January mornings make old asphalt shingles stiff, so on those houses we wait for the afternoon warmth before touching the roof edge. A takedown on a large Atlanta roofline takes a little longer done this way, and it is the part of the job that decides whether next year's install starts on a clean roof.