LONDON -- Remember the recent social media campaign to donate new British £5 notes to charity?

Well it's now two weeks on and the notes are still getting just as much attention on Twitter, but for an entirely different reason.

Basically, the flexible plastic nature of the new notes seems to have turned everyone into an amateur scientist. Interested to see what happens when one of the notes gets put into water, or ironed, or left in the tumble dryer?

Twitter has got you covered.

Tweet may have been deleted

Tweet may have been deleted

Tweet may have been deleted

Tweet may have been deleted

The conclusion? Keep your plastic £5 notes away from dryers, irons and heat in general.

Water may be okay.

[H/T Twitter moments]