ANSWER:

Gargling is not part of wudu. You simply swirl the water in your mouth and spit it out.

The taste of water after spitting it does not impact the validity of your fast.

While gargaling the mouth in wudu after spiting out once do spit again so that there are no remains what if we swolow remains after spiting once

Ablution (Wudhu), Fasting | May 4, 2021 1:46 pm
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Sir, my question is that is there any problem in cleaning the inner parts of lips (slightly mouth) with clean & dry tissue during fast? Does it affect its validity? If yes then does a person need to pay kaffarah or make up that day?
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Is it sinful to eat quite a lot of food before fasting (Suhoor)?