Panasonic LUMIX DMW-MCTZ1E Manuel D'utilisation page 16

Preparation
3
Insert the silica gel (supplied).
≥
Always use new silica gel.
≥
When inserting the silica gel, bend it as shown in the illustration below
and then insert it as far as possible. If you close the Case with the silica
gel not fully inserted, the silica gel will get caught in the O-ring causing
water leakage.
≥
If the air temperature is high and the water temperature is low, condensation
may appear inside the Case. To prevent condensation, make sure that the silica
gel (supplied) does not come into contact with the digital camera lens. To
prevent the Case from becoming fogged up, insert the silica gel about 1 to
2 hours before using the Case.
16
VQT0X68
-Attaching the Digital Camera- (continued)
Silica gel