Changes

Burning sulfur sticks/wicks or disks. For the preservation of empty barrels or other wooden vessels, burn 4 g of sulfur per hectoliter of capacity and repeat every 40 - 50 days <ref>2016. Laffort sulfur disc instruction manual. South Africa</ref>. To use disks, use a disk holder (e.g. [http://www.gwkent.com/sulfur-disque-holder-for-barrel.html GW Kent sulfur disk holder] or create a wire hook to suspend the sulphur sulfur disc in the barrel. Light the disc and place into the barrel, inserting a bung to prevent the SO₂ gas from escaping. Leave to burn for a few minutes before removing and bunging the barrel for storage.

'''Note: Do not burn sulfur in used spirit barrels, as there is a risk of explosion.''' Once a spirit barrel has had a beer aged in it, the ethanol levels within the barrel won't be high enough to cause an explosion.