No. The product has been designed not to stain as long as you apply to dry skin and don't apply too much! A benefit of using Wild deodorant is that it contains no aluminium. The yellow stains that some antiperspirants leave on t-shirts is caused by aluminium in your antiperspirant reacting with the salt in your sweat which leaves a hard-to-remove stain. So no aluminium means no yellow stains!
If you do find you are experiencing a type of staining for Wild, please get in contact with us and we'll be happy to give you some advice.