Open the USB and simcard cap,turn on a fan and face it to the simcard slot,better take out Sim card and sdcard.if the condensation come back again,repeat and do the same thing, until it totally disappear.
Sent from my C6806_GPe using XDA Premium 4 mobile app
Device: Sony Xperia Z Ultra (togari)
Recovery: CWM + TWRP Dual Recovery
ROM: Google Play Edition Tweaked
Kernel: Stock (Modified)
Motorola Atrix 2 > HTC One X > Sony Xperia Z Ultra