As you seem to be new at this, why not get a can of compressed air (sold as a computer keyboard duster) from an office equipment suppliers and try to blow any dust out using that.  Try not to aim it directly at any springs in case you displace them.  You should be able to blast the dust out with very little dismantling.  If you want to lubricate the machine, use sewing machine oil NEVER WD-40 or similar silicone sprays which can be positively harmful to typewriters.  Let us all know how you get on !

Hi LO

Giving us the make, model and approximate period of manufacture will often help us decide the best advice for your machine. A sticky key is usually a result of accumulated dirt or dried out lubricating oil. The most common keys to stick are; Y, H, 7, N and V. Gravity tends to pull any lubricating oil to the bottom of the segment (quarter circle with slots) where it eventually dries and gums up the type bars in the lowest part of the segment. V usually sticks because it isn't used very often.

If your typewriter has an open bottom, place a wad of paper towel under the machine then get some brake cleaner or carburetor cleaner from your local NAPA, Auto-Zone or other similar store and very sparingly, sprits the sticky type bar just where the bar fits into the slot. There are two schools of thought as whether or not to oil the type bars in the segment. Because I keep all my machines either in their cases or covered up when not in use and have mechanical abilities, I oil. Those who keep their machines on display, tend not to oil as oil attracts dust and dirt to the moving parts causing more problems than it solves.

Hope this gives you something to work with and please feel free to ask more questions. We on this forum love typewriters and are more than willing to share our enthusiasm and knowledge with anyone else who would like to know more about a typewriter he or she owns or would like to own. All the best,

Sky