Last Tuesday I ordered 100 test tubes for raising young colonies in from eBay. (I couldn't possibly use them all, they were just cheap. ) Anyway, I have heard that the best way of disinfecting test tubes for use with ants is thoroughly washing in warm, soapy water then disinfecting with alchohol, to remove any remianing suds. Is this a good method, and will it guarantee cleanliness of the test tube and have it sud-free? Thank you for all your help, I don't want to poison my ants!