How often should a dummy be replaced?

[singsong]

Obviously if there is any sign of damage/wear, but is there a recommended time limit that says after X weeks you should replace a dummy anyway?

[Yurtgirl]

Message withdrawn

[jennifersofia]

Really?! Every 4 weeks? Oh dear........

[Blossomhill]

When you think they need replacing. We usually lost ours before they needed replacing!

[alexsmum]

ds's dummys get binned when they are really too skanky to be used anymore. he still has some that i think are the 6 month size.he is 16 months

[janis]

When a dummy looks discoloured or is rather dirty.