My Travel Smart by Conair works satisfactorily, however; after a while the casing feels like it's disintegrating.  Although it still works, my Travel Smart is sticky to the touch and it feels like the casing is melting.  No, nothing was spilt on it to warrant the stickiness.  Everything like dust and lint sticks to it including my fingers and hand.  I'm assuming it's not toxic.  I'm getting rid of it and would not recommend.