Deep conditioning: Summer heat can wreak havoc with your hair and can leave it dull and dry. Conditioning becomes imperative in this scenario. Oil your hair regularly to revitalize dull and dry strands of hair. A little oil on the scalp helps stimulate blood flow and relieves stress.You can also apply some Shea butter on the strands for a lustrous post-wash look. An easy hack for making an effective conditioner at home is rinsing your hair with diluted apple cider.