My two new budgies seem to look a bit dirty, Banjo has what looks like dirt on his beak... and Abi has a dirty bit of feathers just under the beak, kind of surrounding the under part of the beak... will they clean them selves??
Hmmm... they might start to clean themselves. Also, if they ate something, sometimes the food rubs off on them. I know when my budgies have carrots, both of them grow orange beards
But, if that doesn't work, I would definitely give them a bath (if it's warm enough, of course! ) That might help release some of the oils under their feathers to help with the cleaning. You can either give them a dish, with lukewarm water in it, to wade in, or mist them with a spray bottle. My budgies LOVE being sprayed!
Hope that helps!! You can see what the other members suggest!