Help with reels

[Collie Yak]

Hi crew, got a few questions. I am on a total tight budget for my fishing and enjoy getting out in the kayak for Bream and Freshwater species. Lately I’ve been trying ocean and Estuary and my reels have suffered. I only roll with cheap Diawa Sweepfires and Shimano Sienna’s. At under $50 I had to get them. Any way, I haven’t treated them as well as I should and both Diawa’s are cactus. They get dumped in the salt a lot now as my rod holders are flush mount on the yak. Could some one point me in the right direction for Maintenance advice please? Also if I am starting to go ocean what reel setup would you all recommend for my rods (below in my signature) I am not chasing monster fish mainly looking to prep for Salmon season, should be fun on a Bream rod.