I just bought a new Hanna pHep meter. It arrived this afternoon and on reading the instructions I see that it needs to be soaked in storage solution, (not supplied), for 2 hours before first use. You'd think that it would be supplied since it's essential. Storage solution costs $13 + deliv to Australia. Is there an alternative? The instructions expressly forbid using distilled or ionized water for storage. Also, the instructions say to keep the tissue inside the cap moist with storage solution and that if the sensor dries out unstable readings might result. What tissue? There was none in my cap. Is a small piece of foam acceptable? I've emailed the supplier, eSeasonGear, re the tissue in the cap and to voice my disapproval over the storage solution issue. It should be made clear that it's required.