What if the hose is too short to allow you to take the filter off. I guess a couple pair of really long needle nose would do the trick.
Also, can you tell if the filter is "starting" to get clogged? Mine looks nice and white/clean yet.
Then you disconnect your fuel feed line and 'gently' shove it back through the grommet of da tank, then take your weapon du-jour/hook thingy and pull it out/replace/have a beer. While yer at it, if it be an old line may as well replace it too. Take a goodly length, (I like at least 8"+ extra so I can use the cut off piece), feed it into the tank and reach in and fish it out with 'tool-du-jour', replace filter, draw line back into tank (but not too much of course), make sure the filter is seated in da proper spot (usually a 'well' near the outside of tank I think, stand ta be corrected there though), be careful not to push too much line in as you might kink it inadvertantly, cut off excess and re-connect to carb. I really, really like the clear tubing (Tygon?) as now you can see some gas issues should they arise.
Once started test on za tree :chainsawguy: up/down/sideways, when the neighbour complains plead EAB damage and the fifth (good Wiser's is good).
On the 'how kin I tell if its getting plugged' thingy, well your saw won't be running near as it did the day before and slowly get worse. If you know you are running good clean gas then there may be other issues imho.
Just my blatherin' 0,024 $ worth fer da evening, time fer ano9ther nipps...
Serge