The Surface Book isn’t easy to get apart - and neither is the keyboard base. In this case it makes sense why you’d want to use canned air. However, if you can take it apart you’ll get more done by taking the display off and directly blowing the fan off, and then clearing out the vents. The issue is canned air does NOT get to the fan well in an assembled computer, so you still need to tear the machine down anyway. The dust you missed on the fan will cause the fan to run slow, and the computer will still run hotter then if you just did it right - unless you have a system where the fan is first in the chain.
The ideal way to do it is to take the display off, and then clean the fan with a brush if possible - although it looks like the fan is installed in such a way that the fins aren’t easy to get to. For the heatsink fins (and reverse installed fans with inconvenient fin access), you can usually get away with using a dust blower like this, but it isn’t as strong as canned air. If you take the heatsink off and repaste this, make sure you know if it’s standard or gapping thermal paste. A lot of these tablets use gapping thermal paste, while normal laptops (Read: active cooling) use normal thermal paste.
For the performance base (which is the only one with a fan - the IGP edition is fanless), you need to heat up the strong tape holding it together and remove it with a suction cup, along with pry tools that won’t bend the aluminum. Refer to the Surface Book 2 teardown video to see how to do it. The fins are accessible once the cover is off, unlike the tablet.
I would not mess with it under warranty, but if you have no choice it’s doable - but it’s not easy.