40% retention rate, what am I doing wrong??

I am learning Japanese (do not tell me to ask them for advice, there is a certain amount of karma you have to earn before posting there and I haven’t gotten enough after two weeks so I gave up and went here) and in my kanji radicals deck I have a 90% retention rate after 20 cards per day. In the kaishi 1.5k deck, after a few days I have a FORTY PERCENT RETENTION RATE??? I can’t seem to remember them well and I’m not sure why. I’ve tried different recap methods and every time I see a kanji I write it down as well as the furigana. I’m lost and I need help.

I am learning Japanese (do not tell me to ask them for advice, there is a certain amount of karma you have to earn before posting there and I haven’t gotten enough after two weeks so I gave up and went here) and in my kanji radicals deck I have a 90% retention rate after 20 cards per day. In the kaishi 1.5k deck, after a few days I have a FORTY PERCENT RETENTION RATE??? I can’t seem to remember them well and I’m not sure why. I’ve tried different recap methods and every time I see a kanji I write it down as well as the furigana. I’m lost and I need help.