@sowon break it in for a week, you should always break in your switches for a bit before lubing, I usually break mine in for about a month. Spring swap them, springs can have a huge impact on switches, especially linears, order some good springs form TX or Spirt (zeal springs are pretty bad), GON and Catweewee springs are also pretty nice but are not really in stock. Lube them with something else, try a thin coat of 205G0. You can also try MX Zilents (Cherry mx silent red/black stem in Zealpc housing) which have less travel and more mush compared to Zeals but some people swear by them.