Welcome, front strut lubrication is pretty easy, even if my description isnt

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Pop car on high, get the strut return pipes & pull them off (make sure car isnt on, as it'll just pump lhm out of the strut return pipes) at the connection point with the metal pipes that go under the bodywork, not where its attached to the actual strut. You'll then have 2 pipes dangling, get a small bottle, one of those pop one's or anything & put some lhm in it, not too little & not too much, as what you want to do is pop both the pipes into the bottle & they must be fair way into the lhm. You can now fire up the car again. If you put too much in, you might get a bit of spillage. You'll need to zip tie or similar method, the bottle with the lhm in it, to the strut, ensuring that it doesnt tip over at a weird angle when you lower & raise the car. So in effect you may find that dropping the car gradually, you can take a look to see if the bottle is positioned ok, or whether you need to re-site it. Do citreabics qute a few times, you may notice some crap going into the bottle, this is unfortunately quite normal. If its really dirty, take the bottle off, & put some fresh lhm in after cleaning all the crap out & re-do the exercise. Once your'e happy that it appears fairly clean, then pop the strut return pipes back onto where they should go.
Next job is to use something like 3in1 oil, not lhm or silicone spray (unless they are really seized tight) & where the strut turret is, there will be a plastic bung on one side whilst on the other it will be open, pop some oil in the open end, doesnt need to be a huge amount. You can also when the suspension is on high, get the strut gaiter & push this upwards, it'll be connected at the bottom, just needs easing off the plastic disc catch on the strut & then it'll be easily moved upwards, then when you can see the strut piston, squirt some oil at the base where you can see it, do some more citreobics & hopefully the sticky struts will either be cured, or slightly better.
If none of that works, perhaps using hydraflush in the main lhm tank may help, last resort is to replace the struts, or put up with a bit of groaning, as long as it doesnt make much noise when in the normal height position i wouldnt worry too much, if it gets noisey it'll eventually blow off the strut return pipes, thats pretty much as bad as it will get & you will then need to replace the strut, had that happen to me.
Hope the above makes sense?