Tip of the Day: Did you know changes in temperature and humidity change the investments chemical reaction? Open containers or packages allow moisture from the air to change the investment properties. Donât allow the invested rings to bench set under or next to heating and air conditioning vents or in boil out or burn out rooms. Hot or Cold temperatures change expansion and set times. Garages and under sinks or next to air-conditioning and heating vents are not good places to store investment.