Answer

During Upavas, before doing Pooja, one should maintain proper external cleanliness as far as possible.

If you took bath but did not rinse/clean the mouth, then it is better to first rinse the mouth properly and then do Pooja.

Explanation

In Jain practice, Pooja is done with:

• Sharir shuddhi — bodily cleanliness
• Vachan shuddhi — purity of speech
• Man shuddhi — purity of thoughts
• Bhav shuddhi — purity of inner devotion

During Upavas, many people avoid unnecessary water use or avoid swallowing water. Still, rinsing the mouth carefully without swallowing is generally done for cleanliness before religious activity.

Spiritual Understanding

Pooja is not only a physical ritual; it is an act of devotion toward Arihant Parmatma. So we should approach it with as much purity, humility, and awareness as possible.

If the omission was accidental, do not feel guilty. Simply clean the mouth properly and continue the Pooja with sincere bhav.

Takeaway

Yes, you may do Pooja after bath, but it is better to rinse/clean the mouth first, carefully without swallowing water during Upavas.