Rear stablelizer not coming done consistently

I have a 2011 2552 and I have noticed the rear and occasionally  one of the front leveler leveler does not come down at the same time as the one across from it does. Is there something I can do to help them drop at the same time and what do you use for a dry lube,?  and I could use some maintance tips as well.

Update: I have been reading up on my HWH Lever system and will be checking the hydraulic level and do some cleaning, I have so much to learn about all fo the systems on my rig. I’m still on the steep learning curve.

If you have the manual, or the online version check what they recommend for oil / grease on the cylinder shafts.  They might need cleaned and oiled.  It could also be a lack of fluid as you say.  If they are nice and shiny and clean I would guess the system might need fluid.  If they are not shiny then look into cleaning / greasing.

Yes, you need to keep the hydraulic fluid level up.  However, your problem sounds more like dirt. Whenever we've been on dirt roads or one disaster on a dirt road that had just been sprayed with mag chloride, I put the HWH levelers down, scrub them within abandon until they sparkle, then spray with T-9.
https://www.amazon.com/BOESHIELD-Corrosion-Protection-Waterproof-Lubrication/dp/B001447PEK/ref=sr_1_1?keywords=t-9+spray+lubricant&qid=1560218005&s=gateway&sr=8-1.
So far (almost 7 years and a lot of dirt roads), and they are still working great.