tug the spin retrieval line before uncleating the spin halyard to take up the slack and keep the spin from shrimping.

If you tie a figure eight knot at a particular spot between the patches (varies between 2 and 3 patch systems) you can get the snuff started before all patches are bunched up together.

You'll have to experiment with where to put the knot, as having it in the wrong spot will keep the spin from snuffing completely.