We recommend that you occasionally clean the phantom to remove any water residue build-up. For this purpose use only mild soap solutions. NEVER use chlorinated hydrocarbons (e.g., methylene chloride, ethylene dichloride, methyl ethyl ketone, etc…), alcohol, kerosene or benzene to clean the phantom since these could etch, or even dissolve, the acrylic (polymethyl methacrylate (PMMA)) or could erode the bonds holding the phantom together. If the phantom is not to be used for a few weeks, a very low concentration of chlorine and water solution of less than five (5) parts per million (as determined with a pool chemical test kit, for example) may be used to retard bacterial or algae growth within the phantom. However, we recommend that the phantom be completely drained and dried if it is not to be reused in the near future.DO NOT use any mechanical tools when tightening filler plugs. HAND TIGHTEN the filler plugs, otherwise you may damage the phantom if using pliers or other tools. While the delrin or nylon filler plugs are tough, they can still be damaged by misuse. We recommend that you do not over-tighten the filler plugs.Never replace nylon or “plastic” parts such as screws with metal equivalents. Nylon screws and bolts have been provided so that they will “give” when a certain amount of pressure has been applied to them. Generally, it is much preferred that if something has to break, it should be inexpensive parts, such as screws, rather than the phantom itself. Metal replacement parts could damage or destroy your phantom, so if you need replacements, please be sure to use parts equivalent to the original ones.Apply small amounts of silicone grease or a commercially available O-ring grease when the O-rings feel or appear “dry”. Silicone grease is available in the plumbing department of home improvement stores, such as Lowes or Home Depot. Though it might seem obvious, we remind you that the phantom should not be dropped on the floor. Its size and shape might lend itself to being accidentally dropped, but bear in mind that the Limited Warranty will be voided if Data Spectrum Corporation determines that the phantom has been physically damaged by the user.Handle the phantom and inserts with care. Each component is precision and custom-made. Avoid dropping or striking since acrylic is brittle and relatively fragile.