I used soap and water as instructed but it still ended up permanently ruining and staining my board even though the ink was only left on for a day

After using numerous products, I put the markers away and will not use them again, they ruined my boards.

We're using them on an LED board and the colors are fantastically brilliant

and I don't clean the board till the month bigins

They keep their color until it is time to clean your board, window, mirror off

And yes, those 2 did stain my Board

This liquid marker is difficult to remove hardening on our coin shop LED board.

I will update after I erase the board to let you know if they leave ghosting marks

The gold and silver are really hard to get off LED board and don't even look the correct color when the board is turned on.

THREE chalkboards and every color stained the chalk board

Even the other colors were very difficult to erase and I had to use a magic eraser to clean the boards

had they not stained my board, they would have been amazing!

I'm using them on a very smooth chalk board - not sure how they'd do on a more porous one...

So not only does the product stink, it ruined my chalk board.

but it still stained my board if I left on longer then a week

The silver and gold ruined my chalk board.

Love the pens, however they smear easily and the metallic colors stained my board

Messed up my chalk board

Was "drawn" to this set because of the gold and silver colors but disappointed it can't be used on our particular LED board.

The markers are nice, however they stained a standard chalk board

These markers write beautifully, however they permanently stained my chalk board

Used these on an LED board

It completely ruined my chalk boards and stickers I used them all

Also, I know the problem was with the markers and not the chalk boards, because I have used these boards for 2 years with CraftSmart chalk markers and those erased perfectly.

Apparently not for all LED lighted boards

I'm afraid it will stain my board.

somme of the colors stained my chalk board

Also, I bought them for more of a final / non-temporary project, so I do not intend to clean this board off; I would paint over it if I wanted to change.

Beautiful colors, hard to completely clean off my chalk board

Chalk definitely shows up on a black dry erase board great

I guess I should have read a bit more about them, I just figured it was safe to assume that chalk markers worked on chalkboards... call me crazy... very disappointed and confused as to what makes them "chalk" markers

The ink came out in a clean, bright line and helped make a beautiful wedding sign!