What are some good ways to bring out natural blonde highlights?

i have light brown hair and natural blonde highlights. because its winter my blonde highlights dim down a little. are there any ways i can bring my hair blonder again..without like bleaching or dieing?thanks!What are some good ways to bring out natural blonde highlights?
i do this a lot:


-buy chamomile flowers or a tea bag(chamomile is an herb)


- if you buy the flowers strain them dry to get rid of the dust looking stuff


-pour 2 cups of water in a stainless stell pot


-add the flowers or if using tea just boil the water then pour it over the teabags.


- if your using the flowers let the flowers sit with the lid on for about 20-20 min.


-let cool with the lid on


-strain well then pour it over your head/rinse do not wash out(after shampooing)


- sit in the sun for about 30 min-1 hour.What are some good ways to bring out natural blonde highlights?
The lemons and sun works fine just becareful not to get any of the lemon juice on your skin before going under the sun because it can increase the skin's sensitivity to ultraviolet light, causing accelerated burning and skin damage. Don't use lemon oil or juice on the skin in the presence of sunlight. apply it to hair only and then wash your hand or any other part that might have been in touch with the lemon and you are good to go.
Use Lemons and just squeeze them onto your hair and lay out in the sun and you will have highlights and also there are some products at the store that u can buy that bring out ur highlights naturally.