temps on my xp-m 2500 are rising for some reason

[AkumaX]

well, usually on my xp-m 2500 -> 2.4ghz, i hit around 42c idle and 50c load (w/ seti running at night)

now, i've noticed my load temp rising, going from 52c to 54c and just now, 60c!!!

what do you think the reason could be? thermal paste? heatsink moved?

xp-m 2500 @ 2.4ghz (2.3ghz now)
slk-900u + 120mm fan
AS1
nf7-s v2
fx5900
no case

similar picture shown (some things changed, of course )

 

[stevty2889]

?????? umm, what exactly are you asking?

 

[AkumaX]

clarifying for a bit

 

[selfbuilt]

Hmm, dust? Try giving the HSF a good shot with a can of compressed air.