My 3 months old tplink Archer c20 v US router goes extremely hot when working I think almost 50-55 degree celcius . When my room temparature is 30 degree celsius . Is this temparature is alright for m

My recently brought TPlink tl-wn722n 2.4ghz wifi adapter suddenly dops bandwidth from 10Mbps to soo much lower even like 300Kbps . But at this time I am only wifi user . Then i checked my net speed us