syawaa no ato ha, hositu wo suru you ni site imasu.

A natural breakdown is:

• シャワー = shower
• の = links shower to after
• あと = after
• は = topic marker
• 保湿 = moisturizing / skin hydration care
• をする = to do
• ようにしている = to make a habit of; to try to do regularly

So the structure is roughly:

As for after a shower, I make it a habit to moisturize.

A more natural English translation would be something like:

• I make sure to moisturize after showering.
• I try to moisturize after a shower.

の connects nouns.

Here:

• シャワー = shower
• あと = after

So シャワーのあと literally means the after of the shower, which in natural English is just after the shower.

This pattern is very common:

• ごはんのあと = after the meal
• 仕事のあと = after work
• 授業のあと = after class

In シャワーのあとは, the は marks after a shower as the topic.

It gives a nuance like:

• As for after a shower, ...
• When it comes to after showering, ...

This often sets up a contrast or a specific situation. For example, the speaker may be talking specifically about their routine after showering, not necessarily at other times.

If you removed は, the sentence would still be understandable in some reworded forms, but は helps frame after a shower as the context being discussed.

保湿 is read ほしつ.

It means moisturizing, retaining moisture, or skin hydration care.

In everyday use, it often refers to things like:

• applying lotion
• applying moisturizer
• using skincare products to keep the skin from drying out

Because 保湿 is a verbal noun, it can be used with する:

• 保湿する = to moisturize
• 保湿をする = to do moisturizing

Both are possible.

Both are correct:

• 保湿する
• 保湿をする

Using をする can sound slightly more explicit or a bit more formal/written, but the difference is small here.

So these are both natural:

• シャワーのあとは、保湿するようにしています。
• シャワーのあとは、保湿をするようにしています。

Japanese often allows both styles with verbal nouns.

Examples:

• 勉強する / 勉強をする
• 掃除する / 掃除をする
• 保湿する / 保湿をする

ようにしている is a very useful pattern. It means:

• to make an effort to do
• to make a habit of doing
• to try to do regularly
• to make sure to do

So 保湿をするようにしています does not simply mean I am moisturizing right now.

It means something more like:

• I make it a habit to moisturize.
• I try to moisturize.
• I make sure to moisturize.

This pattern often describes routines, habits, or conscious efforts.

For example:

• 毎日野菜を食べるようにしています。
  I try to eat vegetables every day.

• 夜は早く寝るようにしています。
  I make a habit of going to bed early at night.

Because ようにしています expresses an ongoing habit or continuing effort.

Compare:

• 保湿をするようにします
  = I will try to moisturize / I’ll make a point of moisturizing
  This can sound like a decision from now on.

• 保湿をするようにしています
  = I try to moisturize / I make it a habit to moisturize
  This describes a current, ongoing practice.

So しています is appropriate because the speaker is talking about their usual routine.

They are similar, but not exactly the same in nuance.

• シャワーのあと = after the shower
• シャワーのあとで = after the shower, then...

In this sentence, シャワーのあとは works well because after a shower is being presented as the topic.

If you said:

• シャワーのあとで、保湿をするようにしています。

that is also understandable and natural, but it sounds a bit more like after showering, I do...

With は, the sentence has more of a speaking about that situation as a category feeling:

• As for after a shower, I make sure to moisturize.

It could. In fact, シャワーを浴びたあと is a more explicitly verbal expression:

• シャワーのあと = after the shower
• シャワーを浴びたあと = after taking a shower

Both are natural.

The version with シャワーのあと is shorter and very common in everyday Japanese. Japanese often uses noun-based expressions when the meaning is clear.

Similarly:

• 食事のあと = after the meal
• 食事したあと = after eating

Both work, but the noun version is often neat and natural.

Not necessarily.

It suggests a habit or intention, but it does not guarantee 100% completion every single time.

So:

• 保湿をするようにしています

means the speaker is consciously trying to keep that routine. It has a softer nuance than a plain statement like:

• 必ず保湿します。
  I always moisturize without fail.

So ようにしている is often used when someone wants to describe a good habit, a health routine, or something they are trying to be consistent about.

Yes, very naturally.

保湿 is especially common in skincare contexts. So this sentence would often imply something like:

• putting on face moisturizer
• applying body lotion
• doing skincare after showering

Because the exact action is not spelled out, the listener understands it from context.

So if this was said in a skincare conversation, 保湿 would most likely mean moisturizing the skin.

It is polite and neutral because it ends with しています.

That makes it appropriate for:

• normal conversation
• talking to people you do not know well
• class examples
• general polite speech

A more casual version might be:

• シャワーのあとは、保湿するようにしてる。

This drops い in している to make it conversational.

So:

• しています = polite
• してる = casual spoken form

Yes, very often. V dictionary form + ようにしている is a very common way to talk about habits and self-discipline.

Examples:

• 毎朝ストレッチするようにしています。
  I make it a habit to stretch every morning.

• 夜はスマホを見すぎないようにしています。
  I try not to look at my phone too much at night.

• 水をたくさん飲むようにしています。
  I make sure to drink plenty of water.

It is an excellent pattern for talking about health, study, routines, and lifestyle.