How can I get rid of "dishwasher taint" from DD's beakers and bottles?

[Thandeka]

Ew ew ew I tasted some of DD's beaker water the other day and it was minging- definite dishwasher taint to it. I always rinse the beakers well before filling with fresh water but this isn't doing trick. Some I have tried washing in hot soapy water but this doesn't seem to have worked- worried dishwasher taste is now ingrained in plastic somehow and will have to throw away. But before I resort to drastic measures thought I would ask here for suggestions first. Soak in plain water overnight? Never use dishwasher again for bottles and beakers (I hate washing up)? Any ideas?

I don't know what dishwasher taint is, but beakers always taste kind of musty to me unless you really scrub all the nooks and crannies with a washing up brush, including shoving the bristles as far into the spout as they will go. Also then feel with a finger all around the lid to make sure it isn't slimy.

inside of the lid*

Dishwasher taint being "faint taste of dishwasher in an drink from said beaker/bottle

What does a dishwasher taste like? All I was saying is that flavours, bacteria etc seem to get trapped very easily in the lids and spouts of plastic beakers, so you have to be really thorough in cleaning them.

Like scungy washing up water. Will go and buy new bottle brush as ours died but am quite thorough on spouts especially tommee tippe cups where I found unmentionable scunge in there once. Boak!

Ah okay. I tend to use a normal washing up brush, I find the bristles on bottle brushes too flimsy. But then I always seem to buy cheap ones.

Thandeka I'm having the same issue, also tasted it the other day bleurgh!
I'm thinking chuck, I think the dishwasher taste just permeates plastic after a while, I find the same with old plastic sandwich boxes etc.

is it a detergent taste or a stale water taste?

have you taken out and cleaned the filters, and do you use salt in the softener reservoir?

are these plastic items marked "dishwasher safe"?