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I soak in water and bleach for a few hours and then rinse let it dry out and then pop it in the viv. You can oven/nuke it instead if its small enough. Just let it get hot enough to kill everything without catching on fire.
However
My vet highly recomends to varnish all branches and rocks as of potential for parasites to hide/cling to branch. Also makes it easier to clean these items.
many members here have been keeping reptiles and breeding reptiles for many years and most have never varnished their branches.
varnishing does make them slippery.
if i get a new reptile and the vet says they have parasite 'x', i prefer varnished branches and rocks as they are easier to clean whilst treating said reptile. As some reps need more then one course of worm treatment etc in the longterm varnish is cleaner.
its up to you.
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"Ya cant trust a pig with watermelon ya know"
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