A wick is a string dipped in wax so I would say no, they don't give off sulphur.

I use a very dilute bleach mixture--maybe 1 tsp. or a little more? into about 2 quarts of water, add some drops of lemon oil, stir it up and dispense into my spray bottles.   Maybe your solution had too much bleach in it and it ruined the paint?

I keep my liquid dish soap in an old pump dispenser on the back of my sink.  About 1/3 of it is water because I use it to wash my hands as well as clean dishes. ( If I leave it full strength, it is difficult to rinse off.  And besides, it just plain saves money to dilute it, with no loss of effectiveness.)

Also at the back of my sink is a small spray bottle:  I fill it almost to the top with water, then add 2 squirts of dish soap and lightly shake it to dissolve the soap.   Filling it with water first keeps it from foaming up.  I use it to clean off the countertops, my stove top, kitchen table, spills on the floor, etc...

My daughter-in-law liked this idea and took it one step farther.  She buys a scented soap concentrate at the health food store (I think her favorite is peppermint) and uses a very little bit then fills it with water.  When used it emits a nice clean smell and is non-toxic and very thrifty.

Carla 

Essential oils are available in most health food stores.  Other scented oils are sold but some are not appropriate for skin contact (like ones made for scenting pot pourri).

Just wouldn't want anyone to get a skin rash. 

Sometimes I use Oil of Peppermint or Oil of Cinnamon that I have up in my spice cabinet.  They're available in many grocery stores in the spice section, near the vanilla extract.

Carla 

"Just wouldn't want anyone to get a skin rash."

Very true! I'll add that I buy cosmetic grade fragrance oils. These are the kinds prepared and sold for use in making soaps, other bath and body products and perfumes. Even then a person can have an allergy or sensitivity that someone else does not so its best to test first.