What are the ingredients in the cleaning solution of the Braun
(Activator or Syncro models)electric self-cleaning shavers?

This may help:

"...I have made an effective replacement solution for myself. Braun's
original mix is 40% denatured alcohol, lemon and a bit of oil, as far
as can gather. I put about 100ml ethanol / denatured alcohol (also
known as Methylated Spirits, usually it's 95 to 96% ethanol) with a
few drops of 100% essential oil of lemon, and added the balance as
just plain old tap water. (A few drops of 100% lavender for the skin
(& the scent) could do the trick too.)

Don't try ordinary supermarket cooking lemon juice (has slight
remnants of pulp in it), as it will quickly block up the mesh in the
cartridge & you won't get any fluid up to clean the shaver..."

http://iavbbs.com/gflinn/tell03.htm

Best wishes,
Rainbow

Here's more:

"The fluid contained in the cartridge is a combination of alcohol and
lubricating oil. The basin pumps the alcohol through the shaver head,
thus cleaning out all of the whiskers lodged inside it. After giving
the shaver head its bath, the alcohol mixture is pumped out of the
cleaning basin (back into the cartridge) and a small fan located in
the side of the basin turns on and blows air through the shaver head,
drying all of the alcohol out of it. Voila, clean shaver."

http://www.dealtime.com/xPR-Braun_Syncro_7526~RD-86555725444