Why cold water instead of hot water for rinsing a jacuzzi tub?

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Discussion Overview

The discussion revolves around the rationale for using cold water instead of hot water when rinsing a jacuzzi tub after cleaning with dishwashing liquid and bleach. Participants explore various scientific and practical reasons for this recommendation, considering both cleaning effectiveness and safety concerns.

Discussion Character

  • Exploratory
  • Technical explanation
  • Conceptual clarification
  • Debate/contested

Main Points Raised

  • One participant questions the recommendation, suggesting that hot water might dissolve and rinse better, and speculates that energy savings could be a reason for using cold water.
  • Another participant shares a nursing school lesson indicating that cold water should be used first when cleaning with body fluids to prevent proteins from adhering more strongly to surfaces, followed by hot water.
  • A different participant proposes that hot water might exacerbate water-hardness deposits and that cold water could help avoid this issue.
  • Another guess suggests that using bleach with hot water could lead to increased chlorine release into the air.
  • One participant mentions the formation of volatile chloramines when bleach interacts with proteins, noting that this reaction is more pronounced at higher temperatures.
  • Another participant shares a practical observation that rinsing foaming agents with hot water enhances suds, while cold water effectively reduces them, implying a similar principle may apply to the cleaning context.

Areas of Agreement / Disagreement

Participants present multiple competing views and hypotheses regarding the use of cold versus hot water for rinsing, with no consensus reached on a definitive explanation.

Contextual Notes

Some assumptions about the chemical interactions between cleaning agents and water temperature remain unverified, and the discussion does not resolve the effectiveness of the proposed methods.

ldv1452
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This may seem like an odd forum for this question but I couldn't find an answer anywhere else. Why is it always recommended to rinse the dishwashing liquid and bleach with cold water, rather than hot, when cleaning a jacuzzi tub. Doesn't hot water dissolve and rinse better? My guess is energy saving reasons, but I am curious if there is some scientific advantage to using cold water.
 
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I'm not sure specifically about the jacuzzi situation but in Nursing School we were taught that, when cleaning anything with body fluids you rinse with cold water first and then hot water. Rationale being that higher temperatures can denature proteins and such and may cause them to adhere to surfaces with greater strength (think how fried eggs will stick to a pan). So you rinse with cold and follow up with hot.

Empirically I've found the above method to work very well for cleaning the blender or shaker bottle when I drink protein shakes though I'm not sure how relevant this situation is to the above or your own.
 
Just a guess: warm or hot water can force water-hardness deposits and buildup over time. Using cold water will help avoid this. Also, if you are using bleach, I imagine any splashing from cold water might be safer than from hot water.
 
Other guess: bleach and hot water means more chlorine in the air.
 
Fourth guess. Proteins + bleach = volatile chloramines. More volatile when hot.
 
If you have ever tried to rinse any foaming agent with hot water you will instantly understand.

Try it in a sink with a spot of ordinary washing up liquid, generate some foam then try to rinse away with hot or cold. The cold 'kills' the suds; the hot enhances them.

I think this and the other explanations here all point the same way. Pretty unusual in life which is normally about the balance between conflicting requirements.
 

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