Instruction: Extract information from the supporting document to answer the given question.

Input:
Question: how do you get the lines and creases out of the screen
Document: We bought the 150 in because it comes with the hard case. The screen is easy to put together with 2 people. There were siginificant creases in our screen, but we were able to let it sit in the sun for a few days. We sprayed the creases with water and they gradually went away. We used the screen the night after we unpacked it, and the creases (after sitting in the sun all afternoon) did not seem to affect the video on the screen.
This screen is not easy to set up. If you need to set it up and break it down often, it could drive you crazy. Pulling the screen fabric to fit over the frame requires serious muscles and finesse. I had to really pull and stretch it and was afraid the stitchings would break. The most annoying thing is the creases don't go away. The screen material is NOT wrinkle free. Mine also came with two dark permanent spots that could be seen during projection.
Design is awesome, but we returned it because there were black stains all over the white material. The stains make viewing seem out of focus and hazy...not a clear picture. We tried to get the stains out, but couldn't.
The screen's fabric is also made out of a strong material, it has a backing made of black fabric so it is not transparent which prevents light from penetrating through. To get rid of the crease on the screen due to the packaging, I sprayed a bit of water and they went away as it stretched over the frame.3) PortabilityThe carrying case is medium duty material and stores the tubes and the screen perfectly. It is rather heavy to transport, but it's a good trade off for stability and durability.
I wanted to get a portable projector screen to watch movies in our backyard during warm summer nights, or bring it to boy scout overnight camping trips. I have done a lot of research trying to get the right product for my needs. The inflatable screen is too noisy and not to mention the electricity to power up the fans. I ordered a portable screen last year and had to return it because of defects and discoloration on the screen. I decided to give this one a try because the price is right.
I'm returning this as defective! The Camp Chef screen is a keeper!
If you pull it taught first then steam it, you end up with saggy parts of the screen.
Great screen for a church to use. We wuse it for our kids ministry. Works great. Easy to set up
Video from our projector looked great on the screen and clear from at least 20 ft. away. Very happy with this screen.
$$$$ :) For this elite projector screen. So grab some (POPCORN AND SODA POP & SOME SNACKS!!! AND HAVE A FUN FAMILY MOVIE NIGHT OUT!!! ;)
Answer: Screen has to be fully stretched on all four sides, pulled tightly and secured to the frame.  After having done those three things and with the screen being outdoor, the daylight heat should help eliminate the creases.  Keep this in mind, heat expands and cold contracts.  It is best to tighten the screen against the frame during the hottest time of the day, because when the temperature get cooler/colder, the screen will contract, thus further stretching out the screen and eliminating creases.   If you tighten screen against the frame at cooler temperature, when the screen get warm, it will expand thus causing creases and loose ends.