Complex sentence: Mouthwash or mouth rinse with saline (salty water), fluoridated solution or the antiseptic solution chlorhexidine gluconate can improve oral hygiene by removing some tooth decaying materials, in particular it will help to remove some foods that were recently eaten.
Split into simpler sentences: Mouthwash or mouth rinse with saline (salty water), fluoridated solution or the antiseptic solution chlorhexidine gluconate can improve oral hygiene by removing some tooth decaying materials. In particular, it may help to remove some foods that were recently eaten.