Question compressed air questions - i couldn't find answers on demo's

[minni]

Hi, i'm a newb at duster-cans (mine is Dust-Off by Falcon). Having never cleaned laptops before, i guess there's always a first time. The problem is, that the demo's i've viewed on the topic, assume that everyone is born knowing the below points, so I'd appreciate if someone can itemize the answers to the below, in language geared to dummies. Thanks.

1. why was the straw-nozzle designed to tilt downward during every spray-burst?
   
   
2. how many months does the air-gas remain contained within the can when stored in basement whose temp. ranges between approx. 60-80 degrees?
   
   
3. why do demo's show people tilting the cans, even though Dust-Off cans warn: "Use in upright position only"?
   
   
4. why do demo's that demonstrate spraying a laptop externally via the vents not address the few people who ask questions such as "won't the sprayer just push and disperse the dust deeper into the laptop components?" I've seen several commenters bring up these questions without getting answered.
   
   
5. how does one clean the fan (internally) inside a Lenovo Ideapad with a duster-can?

 

[Lutfij]

2| This might be worth a read;
https://www.sisweb.com/referenc/msds/dust-off-sds.pdf

3| Even if it's tilted, the outlet(the triggered part of the nozzle) is facing up, isn't it? You only inverse the can when you've exhausted the contents of the cannister.

4| Not all laptops are designed the same way in terms of their venting and air intakes. Ideally you should disassemble the laptop until you reach the cooling fans as well as the heatsink assembly. Once here, you make sure you've removed all dust and debris from the assembly as well as the fan(s).

5| Lenovo have a number of mobile computing devices listed under their IdeaPad series, both old and new. Which one do you have? By that I meant including the model and SKU to your specific IdeaPad by Lenovo. Look under the laptop for a sticker or label if you're having trouble identifying it.

Moved thread from Computer Peripherals section to Laptop Tech Support section.