Interior light lights problem fuse 27

Hi, I have 2005 Lexus rx 330 and my interior lights stopped to work. I've checked fuse box and fuse under number 27 was blown which is responsible for interior lights. I've changed it twice but it keeps blowing it. Any clue where is the problem? I ve just recently changed tires and timing bell and I hoped my vehicle will not have problems for some time. Now this. I can drive but it is very annoying. All my interior lights don't work, please help.

I am thinking some water got somewhere by drivers door ( I was cleaning extrior myslef fom salt etc. With some water) and it causes the problem. Weather is snowy and in minus. May it fix itself when it will be sunny and warm?
thanks for any help.