Yes, on a towel. I have no idea what caused the spot, but the towel has been relegated to the bin for cleaning rags. Sounds like you have a new dust rag.

Have you tried hydrogen peroxide?

I cant help you here, but I do love a good Shakespeare reference. Your title and post made me giggle. Maybe mamapinky will come by. If anyone could help it would be her.

Bleach directing on the stain. Let it sit for a a while. If the top was put in the dryer, you not be lucky.

Tried bleach. Will see if I have some peroxide somewhere.

i'm with Ava. I have alerted a lot of people tonthis. Well, I do it for them to start. It gets out sweat, blood, wine etc

If you've had your chlorine bleach and/or hydrogen peroxide on hand for than a few months, they've probably lost any effectiveness. Once a jug/container has been opened, the active ingredients in LCB start decomposing/degrading into ordinary salt and water while LHP degrades into water and oxygen gas. IIRC, the active ingredients have a half-life of something like six months once a jug/bottle has been opened. At about nine months from opening, your LCB has degraded to the point where it does little more than add a "swimming pool" scent to the wash water.

So, do you know (have any idea?) what made the stain? I ask because a "yellowish" spot can be the result of a lot of different things including iron oxide in your water and/or contact with rusty metal. When the stain is iron oxide based (i.e., rust), LCB seems to make things worse by setting the stain. When I know I've got a rust stain, I've sometimes had good luck getting it out of cotton and denim fabrics with a paste like Ava recommended with Dawn detergent, lemon juice and baking soda. A friend of mine who works with fabric conservation for museums suggested adding a teaspoon of cream of tartar to that mix and it worked better the one time I tried it. I've also had pretty good luck with mixing some Bar Keeper's Friend (active ingredient being oxalic acid) into a paste with Dawn detergent, but would hesitate using that if the tee shirt fabric were thin or worn down.

That's my 2 cents. Hopefully, as Amylou mentioned, we will hear from mamapinky --- who is something of a laundry guru.

Is the stained top 100% cotton fabric? Also, how did you dry the top? That might help in answering your question.

A chemical called avobenzone is in some sunscreen products, and it will stain white fabrics with a yellow stain that seemingly can't be removed. Some people have had success making a paste of Bar Keepers Friend (oxalic acid) and water and scrubbing it on the spot with a toothbrush.

I have ruined a number of white shirts with it, and now am careful to look at the ingredients of my moisturizers with sunscreen. Many of the Oil of Olay products include this ingredient.

I have hung some white cloth cotton diapers with some major stains outside before and got the stains to go away. I would try that. After the washer while wet hang directly in the sunlight.

Lucille, did this top go thru the dryer? If that's the case you may be looking at the dreaded **permanent stain**

As Larisa says..try the sun. Squeeze some fresh lemon juice on the stain, cover with salt and lay in the sun. Only try this on real whites not off whites.

Yes it went through the dryer. I will buy a lemon next time I go to the store. It may be a permanent stain, it is very light though unless you are a foot away you can't really see it. So it might become one of the 'A.M. first dog walk shirts'. I live in an apt. and the first dog walk is done often before the sun comes up and definitely before my morning shower, so I keep weather appropriate outfits on hand just for the 5 minute dog walk. Since I'm in Texas, a tank top would be appropriate until next October or so.

Graywings thank you I did not realize that about the sunscreen ingredients.

wd-40 sometimes works

I've got a pink turtleneck and a pale green top that have these spots. Right on the front, where it's easily seen. I've tried everything, so these tops are re-classified as my 'don't leave home' tops.

I've had great success in getting various kinds of spots out EVEN when the article of clothing has gone through the dryer with Grandma's Secret Spot Remover.

I've found it at WalMart, Hobby Lobby and Ace Hardware.

Spot shot, maybe

I've used Oxyclean Max Force cleaner, rub on spot and let it sit (directions say up to a week). The things that didn't come clean with other products came out of the washer without a trace. I tried to post a picture but it didn't take - a small cylinder at the grocery.