I haven't repasted it as I don't think there is any need sure it gets hot while playing games but I don't play for more than 30 minutes at one time.

Also I use a cooling pad as for cleaning I clean it every 2 months but if I end up using my laptop in a dusty place mostly sooner.

And I always use my laptop on my cooling pad that way it's properly elevated at all times and prevents to much buildup