Followed the advice here and used bleach - filled up the toys with bleach via the little hole, left over night (toys upside down), squirted out and rinsed thoroughly the next day and it's sparkling clean again. Worked an absolute treat, so thank you for the advice.

Tried the dishwasher option, but not as effective as bleach.

Thanks again, you've just saved me from binning a whole load of bath toys. I find that bathing my little ones in Oilatum makes the bath toys blacker than usual, so a cleanout with bleach once a month it is...

I've heard you can put the bath toys in the dishwasher and it gets rid of the black gunk but I haven't tried it myself.

I tried a second time with pretty much neat bleach, as recommended, and left them overnight and they were spotless the next day (well as spotless as toddler bath toys can be!) So simple and a great result!

Thank you again to the tipsters as it would have been a waste to throw them away but they really had got to the point of being unhygienic for my son to play with!

Using the same method as the other ladies describe, We use Cilit Bang black mould remover. Its fiddly as the nozzle doesn't come off the bottle but it works.
I leave them overnight and give them a quick rince in the dishwasher to get rid of any residue. Ive found nothing that prevents or stops it returning unfortunately.

I'm curious too. I've tried Milton but it doesn't seem to get the black gunk completely. We have tried to find non-squeezy bath toys but they aren't as much fun

How did you get on Golfwidow? I am so glad you asked this question as its something thats been bugging me!

Thank you both, will try again tomorrow!

I am cleaning the bath toys in Milton. Leaving them for a night in the liquid. Nice and clean inside next day

My friend swears by couple bottles cheap strong bleach and rubber gloves. Empty bleach into washing up bowl wearing gloves submerge and squeeze the toys full of the full strength bleach and kesve over night. Next day shake vigorously and squeeze out the bleach and black mould then rinse!

Hello!

Does anyone have any tips for cleaning squirty bath toys when they start getting black on the inside, or do I just have to throw them away? I've tried a mild bleach solution, but it didn't have a great result.

Thanks