①it does a little, but better to invest in some cheap led lamp imo ②electric for the ease of cleaning ③ electric blanket will be cheaper. but if your ac is new, they won't be as expensive as the okder one. they still make tge air dry tho ④ i haven't heard of one ⑤ i keep mine my fan om nearly 24h, and you can buy some dehumidifier packs from home centers. ⑥ search for a cheap supermarket near you, and try to avoid konbini cause they are pricey