To clear & clean your plughole, add a couple of teaspoons of baking soda to your plughole and follow it with a cup of white vinegar. The solution will work together to dissolve blockages and clear & clean your plugholes so that your drains can work properly once again.

I had the same problem and used a scourer and hot water and dish washing liquid.

Try making a paste of bicarb soda and a little water. Smear it on the stains, let it sit for as long as you like, and give it a good scrub. Repeat if you don’t get desired result

I use bi-carb with a bottle brush. When it looks good I then brush with an old toothbrush using bleach. Spotless in no time. Plus it leaves it smelling fresh again.

What interesting comments read on this! Thanks

A good scrub with vinegar and bicarbonate soda.

bicarb and lemon juice – make a thick paste, leave it on for a bit, then rinse off – perfection. works on stainless sinks and draining boards too

i would try bleach and see how you go.

Exit mould works great

Bleach, Jiff, Gumption are all products that have worked for me and a good scourer. When I use bleach I put the plug in, pour some bleach and leave it for a while.

Gumption or a cream cleanser and an old toothbrush works well

A good soak with some bleach or vinegar may be more food environment friendly

metal polish – and really bicarb often acts like a metal polish

I make a paste with a little bicarb soda and white vinegar, and use an old tooth-brush, and it brings a shine up on nearly anything. Keep old tooth-brushed, coz they are so usefull for cleaning fiddly items and areas.

Bicarb and vinegar again! It really can clean everything!

Vinegar & baking soda do the trick for me & also unclog the drains!

I have the same problem, so thank you for your suggestions, will be trying them today.

I spray mine with ‘exit mould’ or a product called 30 seconds. That does the trick. I rinse really well. I also do this with my tea cup. Wash them well afterwards. I use these two products on just about everything. Outside the mould that grows on my lattice, on my picketed fence, bricks, path, steps works really well. I know it’s a chemical just use gloves and air rate the room.

I will admit I add a swish of demestos every few days, just a little but it helps prevent build up

there are some good comments here