Foggy headlight assembley

You have to remove the headlight assembly
https://www.youtube.com/watch?v=kyWB01NQoxY

Here's a link to your head lights. Repair Guides Lighting Headlights AutoZone com

1) pop hood
2) Look at the back of headlight assembly, if you cannot get to the bulb wiring you are going to have to remove assembly
3) remove assembley and disconnect headlight wiring
4)turn bulb retainer counterclockwise and remove bad bulb and install new
5)if you can reach the bulb wiring without taking out headlight assembly all the better you dont have to do step 4

Nope...they are a sealed beam type and if it is foggy or has dew in it the seal is bad. You could remove the headlight assembly and wash it out but you will have it happen again.

If both lenses are foggy chances are your bulbs are acting like fuses and when wet/damp blowing,reseal with silicon,or replace lenses.(when lenses get foggy it is also a sign that the chrome has oxidised.)

Foggy headlight lens is from water ingress and gets trapped in there, the easiest way for you is to unscrew the back of the headlight assembly and get a hair drier and just dry out the head light, it may come back after a few rains,, other wise undo the screw holding the headlight unit, disconect wires and remove unit, I have the submerged unit into water watching where air bubbles come from then apply a small bead of water proof flexible sealand or silastic around the edge where the cover and lense meet, Dont try to take the lense off you will break something. Dry out completly and use hair dryer agin on low setting to make sure all moisture is gone and reassemble back onto vehicle....

Most Auto Stores sell a headlight solution that cleans the fogginess of your headlight. Assuming your headlight looks dirty and cloudy as would a pool, a simple solution is to pick up the cleaner at any auto place. That is a lot cheaper than buying a new headlight.

fromthe rear inside the engine compartment

You cannot clean the insides. The are sealed if you attempt to remove them, which is a big job in itself, you run the risk of damaging the seal and allowing water and moisture to get inside which could lead to more problems. What I would recommend is to visit your local parts store, and pick up a bottle of Maguire's cleaner wax. Apply some of the wax directly on the headlamps and with a terry cloth or a microfiber cloth rub the wax in real good with a little bit of pressure. Allow the wax to cure and then polish it off with a dry part of the towel. Generally these headlamps oxidize and causes this foggy or cloudy appearance. 

what i suggest i can suggest is, buy a clear sealant, and seal the sides of the headlights.

the reason why is air can creep in tha lamps that's why it gets moisture (foggy) and dirty.

hope it helps.