Composition comprising bornyl or isobornyl acetate and certain acids are effective for reducing malodors. In contrast to the prior art, the connection contacts are not solder contacts but are formed of nickelaluminum plated copper and are therefore harder and less malleable and subject to deformation than prior art solder balls. A length of illumination optic fiber and a length of laser optic fiber extend through the handle and the tip. Return links variations may be estimated using a weighted minimum mean square algorithm at the gateway.