The whistling is from the canister not being sealed effectively . Check that there is nothing stuck in the rubber seal that is preventing it from making a good seal. It is a good idea to wipe this area with a damp cloth once in a while to keep it free from dust or debris. Hope this helps.
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If your Dyson handheld vacuum is making unusual noises, see the [https://www.ifixit.com/Wiki/Dyson_DC58_Makes_Unusual_Sound?revisionid=HEAD|Dyson DC58 Makes Unusual Sounds problem page] for possible problems and solutions.
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The whistling is from the canister not being sealed effectively. Check that there is nothing stuck in the rubber seal that is preventing it from making a good seal. It is a good idea to wipe this area with a damp cloth once in a while to keep it free from dust or debris. Hope this helps.
The whistling is from the canister not being sealed effectively . Check that there is nothing stuck in the rubber seal that is preventing it from making a good seal. It is a good idea to wipe this area with a damp cloth once in a while to keep it free from dust or debris. Hope this helps.