Instruction: Answer the given question by extracting information from the supporting document.

Input:
Question: After a few days it went out of focus and everything's blurry. Is there a manual focus somewhere? Is there a way to fix the blurry problem?
Document: The only problem I have experienced is that the camera lost focus when the seasons changed, the fix was to open the camera, remove the camera lens assembly and adjust the focus as you would a manual focus webcam, this can be challenging, as the focus was set at the factory using instant glue, but with a pair of pliers I was able to break the bond and make my adjustments.
Only worked well for about a week. Video image went blurry and out of focus in the 2nd week. Night video was never viewable even during the week when the unit was working well. The unit has been in service for over two months as of Mar 4, 2014., the unit has only work right for 1 week. Amazon does not provide after sales support to answer related question. Disappointment!
This unit started out fine but after three weeks it was recording everything in a out of focus way. Did everything that I could to see if maybe there was an adjustment to fix it but no go. So Would rate this as garbage. Maybe others will have better luck with it for the price (if it continues to work) is good for what it does.
I bought 2 of them, cameras arrived within 2 days , very easy to installed but video pictures are so out of focus it's so blurry you just can't read license plate of car right in front of you even when you stop behind it. There is no focus adjustment, hate to return them since they are so easy to use but so blurry pictures so back to seller.
Cheap product that worked for awhile before it went permanetly out of focus. A cheap way to find out if you like the idea and then buy something better.
When I later drove, it immediately became blurry. Over the next few days, I would wrestle with it, tapping it to make it focus, but it would only last a few seconds. I then realized it was becoming blurry when I accelerated (I guess I drive more aggressively than my wife), and cleared up when I would hit the brakes. What I did was to aim the camera a little more downward, so I could see the hood more, and that has helped a lot.
I used to have that problem until the light bulb went off inside my head and I realized the suction cup needed moisture to hold it up. You can figure out how you want to moisten it yourself. I have my way. If your windshield is too hot or too cold, you have to wipe off the windshield and moisten the suction cup. What comes with the recorder isn't cheaply made--it's something you deal with when it comes to any suction cup and temperatures.
Even in the highest resolutions, the picture seems a bit out of focus. The metal nut that the mount screws into came loose in two days, but was easily repaired with super glue. An adequate and inexpensive way to find out if a dash cam is for you.
I only used this for 1 day and it worked fine besides the audio. The audio did not work at all out of the box, but I didn't care about the audio very much. The main proble, is that the 2nd day I tried to use it and it stopped focusing, so it stayed very blurry and I cannot fix it. The quality is NOT 1080p nor 720p.
After I did this, it went back to the original issue (popping welcome screen). Obviously, there is a short in the board somewhere. This device is an electronic nightmare. Don't buy it unless you have some extra cash to blow and love solving mysteries or take a 50% chance of it working for you. If I didn't want one of these so bad, this would have been my tech engineering dream project.
Answer: Mine also went out of focus after about a month of use... I figure sun-induced heat in the car caused it.   I can only guess that maybe the mounting adhesive on the sensor chip let go and it moved in relation to the lens.  I took the camera apart and found that the lens on the camera is on a threaded insert that has been glued in place after the factory set the focus.  I inserted a sewing pin along the threads and under the blob of glue to pry it off and then turned the lens a wee bit at a time until I got it back in focus.  It was not hard to do, but I found the built-in display was too small to really detect whether it was in "perfect" focus, so I used a somewhat tedious procedure to do it... I would make an adjustment, partially reassemble the unit so the battery would fit again, record a bit of video, move the memory card to my PC to view the video, then return the card to the camera, make another guess as to which way to turn the lens and do it all again.   If you try this, make very small adjustments at a time, you probably won't have to turn it more than 1/8 turn (or less), but I cannot say which way you will have to turn yours.  Just try one way and if there is no improvement, try twice as far the other way... put some scratch marks or paint dots on the sensor housing and the lens barrel to help keep track of how much you have moved it.  Do be careful that you don't twist the sensor housing where it is attached to the printed circuit card; just turn the lens.  You will probably have to clean the lens when you are done, too!