Finally, if you have leftover titrant in the syringe after testing all the samples, resist the temptation to be thrifty-DO NOT put the leftover titrant back into the reagent bottle. Discard it along with the sample and other wastes. Although some monitors wrap the individual reagent bottles with tape or aluminum foil to further exclude light, Wildberger does not recommend this. He points out that light-sensitive reagents are supplied in amber bottles to protect them from light, and that covering the bottles with foil or tape makes it difficult for monitors to inspect the contents. Each time you finish using the kit, rinse out the sample bottle and titration vial with tap water.
Detergent is both unnecessary and inadvisable.
You don't have to rinse the titrator syringe between uses. However, remember to store the syringe with the black neoprene tip backed off from the bottom. This helps prevent the tip from getting stuck. Another way to prevent sticking is to coat the tip with a tiny bit of silicone grease, available at hardware or plumbing stores. After rinsing, make sure all items have dried completely before you put them back in the kit.