I recently obtained the supplement kit including R 0870, and R - 0871 for for FAS/DPD chlorine drop test BUT instead of storing at room temperature instead left powder (closed) on patio table under canopy not in sunlight for three weeks before realizing should have kept inside at room temp. Powder abit caked up but swirled and broke up any small lumps, does this out door exposure affect the integrity of the powder? Now keep it inside.