yes . can claim warranty .

but if it is only during rainy day , that is normal . due to the difference in temperature . in the old cars like proton wira , it is not so significant becasue the casing is not clear type .

anyway , i have seen other makes having the same problem also , i mean the mist inside the headlamp when the weather is rainy .

hope what i have said can help you.

dup dup is normal sound.
forgot what sound already.
it used to be one of the discuss-topic in waja forum ages ago .