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pitched my tent last weekend to find in horror that the inner tent has started to go mouldy or at least we thinks it is mould  

Any advise on what we can use to clean it off or at least prevent it getting any worse - tried just warm water but thats not touched it. 

it is the inner from an Outwell Georgia so it's the full works SGS etc so i can't stick it in the washing machine.

Looks like the tent was packed away with the inners still a little bit damp is it black spots on the cloth that you have got , you could use a dilute solution of Milton sterilizing fluid to kill the mould spores but this will not clean the black spots

As it is on the inner tent you could try scrubbing it with a mild detergent or  one of the modern tech was solutions like nikwax

One member on here used Dettol Mould & Mildew Remover Trigger spray on the inner tents and said it worked well,  I have not tried this on inner tents but I have used it on hard surfaces and fabric shower curtains with great success

I would have thought it would be ok on the inner tent as it is not waterproof but don’t put anything like detergent near your outer tent/flysheet

thanks guys. just nipping to go outdoors now but gonna pitch the inner up in the garden this afternoon and try and tackle it.  bought Milton and the Dettol mould and mildew remover so will report back if either prove successfull.

Whatever you use, rinse it off really, REALLY well. Soak it through with a hose several times, then leave it pirched till dry. Otherwise it's possible that a condensation-damp flysheet could get blown against it and any residue will transfer over.

Out of the two, I prefer Milton to the Dettol M&M remover. The latter contains surfactants ie the stuff that breaks down water surface tension. You don't want that anywhere near a tent flysheet.

Quote: Originally posted by Valk_scot on 31/5/2009

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Whatever you use, rinse it off really, REALLY well. Soak it through with a hose several times, then leave it pirched till dry. Otherwise it's possible that a condensation-damp flysheet could get blown against it and any residue will transfer over.

Out of the two, I prefer Milton to the Dettol M&M remover. The latter contains surfactants ie the stuff that breaks down water surface tension. You don't want that anywhere near a tent flysheet.

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As ever, Val is right. Many household products contain surfactants which can affect the waterproof treatment on tent fabric. When I have had a mildew problem on a tent, a 10% Milton solution works to kill spores and any odour but will not remove the speckling. Nikwax tech wash can go some way to reduce the marks, but won't remove it all together. And you need to dry it off very thoroughly indeed, so a sunny, breezy day is ideal.

Good luck in sorting it out.