if your veiled has puffy eyes seek a vet who knows chameleons asap. and no you shouldnt just "take it outside and spray it with a hose", soak it in very hot water, depending on how big it is, if you are transferring ANY materials into another cage to a different animal, soak them in a bath of extreamly hot water for a good hour or so. as far as bamboo. im not sure, i dont think it would hurt, bamboo isnt something they could eat, just take any leaves off if there are any. it would just be used for a climbing. also too, ANY other plants you have, do research on first. go to flchams.com and click on the safe plant lists, it lists everything. your chameleon could of very well rubbed his eye of something he could be allergic to. prepare dont just throw things into cages. hope this helps